Why ? Just why ?
I am not gonna try and change your mind but here's another perspective. using Cryptocurrency does not mean the person wants to be anonymous. believe it or not, many gamblers like the wide variety of gambling sites they can play on when using cryptocurrency. besides, even if the crypto casino says they have KYC a lot of them only ask for it in certain situations so there is a chance that you can play for a long time without even being asked to do a KYC.
Every top casino site does not ask for instant KYC after we register an account, we can play any gambling and can make withdrawals without KYC only unless you win big bets and there are suspicious factors in your account. Just like you said above, that we don't need to avoid top casino sites because they only implement KYC to avoid money laundering and other criminal activities that take advantage of gambling sites.