I believe that if websites actually cared, if adblockers was a big issue for them, they would get to detect when a user uses one, eg by looking at specific parts of the webpage that are not loaded. There are some that do it. Even if it turned out to be an arm's race, it is a socially beneficial one imo, because it could reduce the appeal of the tracking-advertising model, by increasing the cost of keeping it up. But that's not what is going on here.

Personally I don't just block ads, but as much of any third party js/requests I can without breaking a website. Websites do not load any third party js etc by default except from some whitelisted domains. This takes care of a big part of the most annoying things out there. If you do not want to serve me the website if I block this stuff, don't do so, I don't care.