If they ran less hostile ads, people wouldn't be as hostile to watching their ads. Some of the ads they run are just ridiculous and awful. Ads for scams, soft-core porn ads, just the worst of the worst.
I think that’s a rationalization. Most people just don’t like ads no matter what they are. And I can’t blame them, ads are terrible. But this is a case where they offer a nice subscription that takes them all away, so people ought to buy that instead.
The YT Premium subscription suffers from being low value imo, forced bundling with YT Music which inflates prices, and little to no synergy with Google One subscriptions in most countries.