The problem isn't so much the rabbit hole but YouTube pushing peoples on certain political viewpoints.
After you’ve seen the two 15s ads, of course!
The rage train is profitable and has no breaks, after all!
I am subscribed to Forgotten Weapons channel (the only gun related channel) and I never got any crazy, conspiricy etc recommendations.
Maybe someone else is using your youtube channel to view stuff and inadvertently poisoning your recommendations?
So I watched a few videos from Derek of "More Plates More Dates" about body building/steroid use and sure enough I was getting various Jordan Peterson videos, some "why x woke thing is killing hollywood" and even some repackaged Andrew Tate stuff. It's like an excited friend who hears you enjoyed Watchmen and has hundreds of comics to recommend. Except it's much less pleasant.
The novelty bias occurs outside of YouTube as well. I was walking in London a few years ago and an old guy asked me for directions to the local mosque. I had to look it up on my phone for him and for a couple of days I had recommendations about other mosques/muslim bookshops I might want to check out.