Paying 13 bucks per month, which is a non trivial amount for a lot of people if it competes with other subcription services, merely to block ads on a website that doesn't even produce its own content is in my opinion one of the worst deals on the internet.
That's equivalent to a Netflix subscription, which puts what, 20 billion into original content each year?
People make videos because there is a platform which makes it incredibly easy to share that video all across the planet without cost to them. And in turn that platform has an enormous base of viewers for that content. To suggest that a world without YouTube (or a similar service) would look the same is ludicrous.