The advertising industry is run by people trained for centuries to do one thing well - find ways to mine your finite Attention. This is what they spend their mind on 24x7. They have discovered thousands of ways to do it. So blocking one or two paths at a time doesnt do anything useful.

Human Attention so far is not treated as a scare natural resource. So there is a free for all overfishing of the finite pool going on.

Since politicians/lawmakers also use the same mechanisms to harvest attention the Ad/Ad tech industry has regulatory capture. It will never collapse just like Big Tobacco is happily chugging along baring some major public catastrophe.