People who make non-advertiser-friendly videos need to figure out some other kind of way to make their money. Patreon is excellent for that.
Further I do not buy the Not Ad friendly BS, there are TONS of Advertisers that would put (and have to try to buy ads) on some of those channels but Youtube either refuses them as Advertisers or otherwise does not give the Advertisers the proper control to pick and choose which channels they want to out ads on, it says you video is not ad friendly and that is that, the advertiser has not input in it.
Finally Advertisers care about eyeballs, they really do not care about the content of the ads UNTIL they get people complaining or boycotting their product.
Today there are a small number of permanently and perpetually offended people that are VERY vocal, and VERY loud on social media that have wielded undue influence over these YT Advertisers with their threats of boycotts and outrage. These people have no respect for the freedom of expression, and desire nothing more than to shut down the speech of anyone they disagree with.
source on this? I'd like to read more
One of the keys to YouTube's success is its sub feed. All the videos from all my favorite channels, all in one place. It's extremely convenient. People tend to take the path of least resistance.
Content creators that don't produce content for 5 year-olds need to start looking somewhere else than YouTube.