So, then you're getting his stuff presented to you as someone else wants to present it. Not watching their stuff is a major problem if you want to comment on it. That's how Chappelle was wrongly labeled a Trump supporter.
No, if a specific joke or set of jokes generate controversy that piques my curiosity, I make sure to watch them in full context to know what the fuss is about. But I don't watch stand-up comedy otherwise, since I don't find it entertaining.
He's pro-animal, pro-environment, pro-trans, and very much pro-free speech. It's not his fault if a young audience can't see how a message can have social awareness and even many of the same values despite coming wrapped in a very different package.
He has markedly unscientific opinions on animal testing, so his animal rights activism is also mixed with demonization of necessary research and, consequently, the people who carry it out. Ironically, he could well fall within the category of overly "woke" people in that regard.
His views have no bearing on the question of whether comedy can create harmful influence, though. As far as I can see, it definitely can—and it can also have a significantly positive social impact (e.g., in mocking dictatorship and raising awareness about it in a humorous manner).
And why should he cater to young audiences? Not all of us are young and we have our likes and dislikes as well. We also tend to have that "set in our ways" thing going for us, even if we aren't old yet.
In fact, trying to make it an issue of age is what is called ageism.
I'm not saying he
should cater to anyone in particular; just pointing out why I believe his attitude is outdated and increasingly going out of fashion.
There are many people around his age who disagree with normalizing certain types of comedy, so the way I see it, the fact that he's a Boomer partially puts into perspective some of his attitudes, which are in agreement with certain prevalent norms among his generation. Highlighting generational trends seem to me a form of a cultural commentary, if anything, similar to how one can talk about Millennials' prevalent relationship choices or Gen Z's social trends.