Even people you'd really expect to use adblockers. A good example is right here on Lemmy, people here are generally pretty tech-savvy yet you get threads with lots of people complaining about ads. This has been a weird lesson as I get older, seeing that most people somehow don't even think about lifting a finger to fix things they see as problems, they really just complain and then do absolutely nothing to help themselves. It's the same with if someone mentions something they don't know what it is, instead of taking 5 seconds to just look it up they comment to ask about it and then never reply to people answering their question. I'm certain that it's very common to have some weird need to make others do work for you, they don't actually care about finding out what something is or how to do something to fix a problem, they just care about making others spend any kind of effort for them.