Earlier quoted context omitted.
The thing about the gun-related stuff is that it's 99% perfectly legal (yes, there are videos about illegal mods, but those were not specifically targeted). I don't think they're worried about lawsuits. This is all about political optics.
I think it's also about those channels not being suitable to advertise on / having a bad demographic to advertise to and them being funded by patreons or private shop backers advertising in-video. YT gets very little revenue from that even though they are high-volume channels so it's just a pure cost cutting exercise.
I don't follow. A full 31% of the US population, most of whom have sufficient disposable income to blow $600-$2000 on a piece of steel and polymer. How is that a bad demographic to advertise to?