Yes but compare it to trains or busses. If I want to take the train/bus I make sure I am at the station 10 minutes before the vehicle departs.
In my experience the good time to arrive before a flight (with luggage to check in) is roughly 1 hour before (and this nearly wasn't enough in some cases).
If we talk about a short flight that can add more than 50% to the flight duration on the ground for (1) putting the luggage somewhere, (2) going through the security funnel and (3) getting to the plane.
Sure I get why things are shaped the way they are, but if I wanted to cut travel time I would first have a long deep look at that.
