Interesting. Mine are awful, spam-level awful. (Even when I had an account and subscriptions.)
But I think my point stands - recommendations don't actually need any network effect, or to be done by YouTube itself. You could have a third-party/OSS recommender, it's just pretty niche and probably doesn't exist.
IMO YouTube can be used as a dumb content store. It's on the creator side that it has the 'network effect' handcuffs - it's the content store everyone goes to, so if you make content, it's where you need to store it।