Supply & demand. If there is demand for dumb TVs and dumb cars, this supply will (eventually) be met. Vote with your wallet.
Also, do not forget the second hand market for cars. This one's huge. There's still TVs and cars available which are dumb. There's still laptops available without Intel ME.
> This is the situation we find ourselves with email (all email providers mark any other email as spam).
What are you on about?
I keep hearing that, I just never see it. There are a lot of things nobody wants which corporations push in unison because they want them. And that's not even accounting for the meddling of the marketing department, which does matter.
Such demand will never rise to substantial levels. The moment your solution to a problem requires the general public to (change their behavior/become educated about something), your solution is unworkable.
If the general public regularly changed their habits out of principle, Windows would have been displaced by Linux in the 90s and the banana and diamond industries would be dead or dying.
It doesn't work that way, and it's unrealistic to assume it ever can.