Blocking ads is a security necessity, not piracy.
I’m sure you are trying to equate blocking of ads to cutting off their income stream or something, but it isn’t anything like that. It is just not displaying something that would be ignored anyway with the added bonus of not letting the advertisers collect metadata on you without your permission. Blocking ads is comparable to not looking at billboards, but even better!
The thing with sources is that sometimes it is hard to know how reliable they are, and sometimes they do let you down.