"Yes, power users complain—and still continue using the site" I wonder what would happen after you removed old.reddit.com and api access for reddit apps. For icing on the cake, use creative class names to f*ck with RES and ad blockers. My guess, if you do all of this, reddit's gonna crash on the ground pretty quickly.
1) The ethicality of something is not sourced from nature. If this would be the case, then raping would be completely okay as animals doing something like that too, right? It's more coming from empathy, like we don't let people beating or killing each others as you don't want that happened to you as well.
2) In reality this is more like a demand issue. I eat meat because I like it even if I see it as somewhat unethical. Your personal decision does not really count, but the society's overall understanding of the issue. It's like your vote vs election results, your vote counts, but you are not gonna change the world single-handedly.
Personally I think the real solution will be growing meat artificially, only muscles without the rest of the animal.