Very rarely do I get into LTT forum discussions (because it's funnier to see people fight about apple or nfts) but this I feel like hits closer to home since yes I do use adblock. I'll give my own input on this
Do I use it all the time? No. If the site has non-obtrusive ads (banner ads that don't fking cover up your entire screen telling you to play raid shadow legends) and the ads aren't scams or full of malware if accidentally clicked on whether the site itself is legit or not, I will hands down turn off my adblock and whitelist the sh*t out of that site. As for sites like YT, I honestly wouldn't have a problem not using adblock if they were not only short ads but most importantly, RELEVANT to my interests. In which in my own experience, I rarely ever get ads that catered to my interests on YT (like the awesome LTT ads that I honestly like getting though they were very rare). Most of the time I get either irrelevant ads or ads that are just scammy as hell. Hey maybe I'm just unlucky. I honestly don't think I'm immoral based on the reasoning here but hey maybe I'm just too paranoid.
As for the legality argument, I'll leave it to the people who understand it the most whether it'd be people for or against the argument. And if it comes out that I'm actually a pirate 100 percent for using adblock, well so be it but I doubt I will be in a courtroom anytime soon. Also this would make it my first instance of actually being a pirate /s
Also there is one point here that caught my attention that some users have made. That being the find another site argument. Which can work and not work. Sure you can find easy alternatives for certain sites but on the other side of the coin, what if there is no good alternative like for example, YT? No site will ever reach the quality that YouTube has even with the problems that many users have with the platform, it is for better or worst the best we have.
Anyway my 2 cents and I'm going to keep using my adblock and disable it for sites that deserves my clicks like LTT forums.