From what I know about gambling sites there is a trend that is the same as what we are discussing in the thread. Years ago practically no gambling site required KYC. Nowadays there are a few left but less and less, so the trend in the future is going to be like that. If we want to defend privacy we should defend the gambling sites without KYC, and only play in them. But the fact is that privacy has been lost in gambling and the use of crypto gambling sites does not seem to have decreased.
Isn't that because the owners too need to be able to spend their money legally? Anyone could create an online crypto casino, and as long as the owner is anonymous, they could run it on .onion and stay anonymous. But when they grow bigger, and the owners are swimming in money, they can't explain all that wealth to their local government without making their casino fully compliant.