A competent regulatory scheme would have had the government enforcing this from the beginning, instead of depending on private action that seldom happens, but here we are. Uber ignores taxi regulations, AirBnB ignores zoning regulations, and everyone ignores accessibility regulations.
non sequitur
If there was a regulatory scheme (competent can't really be defined) at the beginning of the internet we would all still be using aol dial up at best, there would be 3 content creating entities at most, and we would be paying for monthly "bundles" of web sites.
It sounds like you think there should be no disability accommodations. Is that the root of the disagreement?
I've been paid to implement accessibility. I made a lot of money.
A "sidewalk" is a footpath adjacent to a road.
A "curb cut" is ramp from footpath to road.
For all the hate the "bloated" web frameworks get, the one thing they usually have out of the box is accessibility.
1. Or other assistive tech.