Almost all the casinos I have been to do ask for identity, to make sure you are old enough, and in the case of the ones in my place, to make sure you are allowed to go in. They do not keep the info unless you sign up for membership.
Most people also do not mind KYC,,, in my opinion,,, they are only afraid that people will do things with their data. If I can trust the info is not used or kept,,, I do not mind at all. But IF there is NO need for KYC, and people ask for it? Then I also have a problem. I will always choose somewhere where they do not ask first.