Those who go through the effort to make good web content, and who pay the costs for a web server deserve to be paid. So ethically I should not block ads.

I block them anyway because ads also have an ethical contract with me that they have broken. They need to not take up too many resources on my computer, not make noise when the website otherwise has no noise content, not install malware, and be for legitimate products not scams. Probably more as well, but the above are things I regularly caught ads doing before I got an ad blocker.