They do, AFAIK creators get much more money from Premium viewers than ad-supported viewers. And not just relatively, sometimes in absolute numbers as well.
That’s the kind of comparison YouTube hopes you do.
Compared to patronage systems, it’s a pittance. You may as well try to pay your favourite shows directly rather than give your money to Google and have them redistribute it on your behalf.
Google is providing a service here. I think people have gotten so used to the internet they forget the massive costs involved in running a website like YouTube.