I can see it both ways. I think that what you said are viable. I use YouTube Red, so I'll talk about why I like it.

The thing I like most about YouTube Red is the service for downloading videos to your phone, and that they get to play in the background. Granted, background play is a feature for some other apps, but YouTube has been running at a loss for a long time, and hasn't made much profit so I see where they'd make it paid. I think that using adblock is unethical because the creators on YouTube currently don't get paid much from ads, and most of them are dumb and only rely on ads for money, and they don't make a business. But, YouTube should find more ways of making money, as it would be best if there were never ads in the first place, but that will be very, VERY tricky.