This is why there are PayPal stealth accounts, most companies do kyc as a formality to appease governments/avoid legal troubles, or so to say they do the bare min to verify the information. That being said, they will enforce it if you get a big win... It's a risk either way. it's probably safer to assume all sites will require kyc unless they have a reputation of not. And it's safer to just not gamble if you're not comfortable providing it or risking your funds.
Here, you spoke my mind and I completely agree with you, alot of gamblers complain about kyc today, and what you said has always been my opinion, it's better to just stay away from gambling completely if kyc is a big issue for you.
Kyc (from my personal observation) will never go away, it will only elvove, maybe in the future, new technologies will be built or invented that will make passing kyc verification more easier and stress free, but then, it's something we all should already get used to as long as we are sending and receiving money on that internet, because aside from casinos, most exchanges have made kyc verification mandatory for all users before they allow any form of deposit or withdrawal.