It is better to do kyc because if you use a no kyc site and gamble there regularly then any time they ask you for KYC you are bound to do it so it is better to start gambling at a trusted casino site from the beginning and get KYC verified there. Well it will surely give you chance to gamble there. But if you gamble on a non KYC site then a fear will work in you that anytime they may ask you for kyc. Or your account may be compromised. So it is better to be clear from the beginning
There are some gambling sites with no KYC and that you can gamble and they are still reputable, but I have not done that beyond this forum, only on this forum that I see that. Aside the gambling sites on this forum, if I want to choose a gambling site, I will just go for KYC gambling sites. But what is most important is not KYC, it is obtaining a license and how old a gambling site is. Some people do not even care much about license is a casino has been existing for a long time without unsolved cases of customers that compalined about the casino of fraud and inability to withdraw.