I'm not sure I morally disagree with advertising or tracking. (In my case, my websites are aimed at adults and there are no concerns about children seeing inappropriate content.) It's not about the morality or even the tracking for me. I personally don't even mind tracking all that much (though I know I'm in a tiny minority on HN).
I just, simply, really fucking hate looking at ads. They're annoying and distracting and ugly and will make any decent-looking website look tacky and dumb. And I thought, if I would never want to browse my own website and see ads, why should I subject other users to them? Sure, I use an ad blocker, and most of my users probably do, too, but I'm sure there are many who don't. And there're also the practical concerns about ads affecting page load performance and bandwidth consumption, but that's a more minor consideration.
I also try to avoid commercials and video pre-roll ads (even those HBO ones advertising other HBO shows), and I skip past all ad/sponsor parts of podcasts and YouTube videos. I can only think of a single time in my life that an ad led to a purchase, and that was from a YouTuber I liked doing an absurd segment that unexpectedly turned the entire 10 minute video into an over-the-top ad for the sponsor, and it was funny and well-written and well-executed and was something I was already planning to get and seemed to be a good deal and a good product, so I actually did buy it a week or so later. That's one exception out of hundreds of thousands or millions, though.
I admit I do feel what might be a kind of revulsion at the thought of huge companies like Google and Facebook making advertising their primary revenue source, or the thought of some of our world's top minds being paid amazing salaries to figure out how to get more people to look at and click ads. But I think it just comes down to me not wanting to see or hear them. They waste my time and/or much of my visual field, and are an eye/ear-sore, and I'd like to do unto others as I would want them to do unto me.