As you say, for many motorists, giving up space on even some roads to cyclists is treated like some sort of war crime. There's very much of attitude of, "we can't just have a majority of the road space -- we need nearly all of it!"
A) Cars have a tall stack of interest groups with money to throw around politically. Manufacturers, Dealerships, Gas corporations. lobbying groups including, especially, but not limited to the AAA all have skin in the game and have thrown money at politics. (In general bicycle groups are rarely as organized, rarely have much in the way of profits or income to burn on political favors.)
B) Taxes. Today roads are partly paid for with gas taxes and sometimes vehicle property taxes. A lot of motorists feel so entitled to the roads simply because they see those tax numbers directly on their gas bills and vehicle registration fees and think that they own the roads because they feel like they have the receipts. (Nevermind that there is no state in the US that entirely pays for roads out of such taxes, and the "I paid for it, so I own it" fallacy seems to refuse to ever actually prorate its "ownership" against the actual small percentages any individual contributes to the total budget.)
Which is hilarious because road damage squares with the weight of the vehicle and bike lanes would need to be repaved maybe once per century.
If you replace 3 car lanes with n cars/lane/hour by 2 car lanes plus a bicycle lane, car traffic/lane/hour goes down as soon as you have over n cyclists/hour on that bike lane. At that density, that bike lane looks empty (https://www.boredpanda.com/space-required-to-transport-60-pe...)
I think that is massively underselling the disruption to traffic. Depending on the city and the traffic patterns, hundreds of thousands or even millions of people could be commuting into a city on a given day. Reducing the car throughput on a significant portion of roads will cause backups to spread across the road network, affecting thousands.
Maybe switching to bike lanes can be a net positive, but it all depends on the commuting patterns of people living and working the city. Then again, maybe if car commuting is made painful enough, it will accelerate shifts in commuting patterns.
With careful planning the interests of vehicle commuters and cyclists can be balanced for maximum benefit, but I think in the long term changing zoning and development strategies will be what's needed to really make the shift.
You can maintain throughput and accommodate even more people on bikes if they just ride on the streets themselves rather than confining them in narrow bike lanes. A general purpose traffic lane can accommodate far more bikes than any bike lanes possibly could.
It is not about forcing others, it is about freedom of choice. Bycicle is just one of the modes of transportation. People without choice have to use car.
City streets are narrow and extremely uncomfortable to drive on as it is.
I agree. I live in a city and am constantly afraid of all the gigantic cars that fly by me whenever I walk anywhere. I'm also constantly (albeit much less) afraid of someone stepping out onto the street when they're not supposed to and not being able to stop in time. But maybe, just maybe, the cars (that get bigger every year) are the problem? Maybe instead of declaring that roads are for cars and roads are too small so nothing can be improved, we could make it easier to get around cities without a car?
I just find it ridiculous that anyone who lives in a city has to live with the fact that a 3 inch curb is all that's stopping a massive hunk of metal from running them over. I find it ridiculous that bike (or non-car) lanes are considered evil because of the idea that not being able to park directly in front of your destination means that no one will go there. And I say this as someone who drives a car and rides a bike in a city, because I'm well aware that a lot of people who ride bikes do so in a very unsafe way. But I'd take getting hit by someone on a bike over getting hit by even a moped every single time.
People live in cities, not cars. I shouldn't have to fear for my life while walking down the street.
There are still jams in Stockholm, but only for people who chose to ride by car, their problem!
Of course I've driven in big cities. I agree that it's not great...which is why the solution is to make alternative options as viable as possible: walking, biking, transit. Then you don't have to drive in big cities, and more space on roads is freed up for those who do.
Cities are defined by their population density, and cars by their nature are geometrically inefficient. The solution is higher efficiency modes, not doubling down on something ill-suited to its environment.
You know, looking out for my own safety.
EDIT: If following the same rules as everyone else is too much to ask, maybe you should just stay off the road no matter what you're driving.
Why is this so hard to understand? Unless you're a delivery vehicle, driving in a city is just antisocial.
When you're thinking in that context and imagine switching modes...it just sounds terrible. Because it is.
That doesn't mean the solution is everyone driving forever though: the solution is improving the infrastructure and land use to where other options ARE more viable. They should be good enough to where you don't have to convince anyone to use them; their usefulness should speak for themselves.
Your car is too big.
EDIT: Since I can't respond to the comment below me, the Juke is slightly taller than a Mini Cooper and about as long and wide. I literally can't find a smaller car that I'd be comfortable driving on the highway.