Well it turns out they kinda do. Sites have terms of service people supposedly agree to, all the time, without reading, because it's fucking impossible.
I posted this argument before and got the following comments which make a good argument:
https://news.ycombinator.com/item?id=14095147
https://news.ycombinator.com/item?id=14095410
However the comments get into implementations like Netflix and rendering that data, but it's a bit different because in that case you are paying for access.
Will we be in a world one day where sites can require specific web browsers, by law?
We say the same things with government waste over military and healthcare. And we can fix it in the same ways with better trust, accountability and regulation.
Do you realize just how much advertising funds? It's a 12 figure global industry and 99% of the content you consume is funded in part by it - and that's before we get to how advertising drives the economy by efficiently matching businesses to customers. Every company relies on advertising (whether paid, word-of-mouth, etc) to succeed.
It's irrational to see so much hate and it's likely your complaint is really only about intrusive ad formats and data privacy. That is something I agree with and I'm for every change that makes for safer, better, and more private ads, but that is vastly different than calling for the elimination of advertising in any sensible reality.