Aside from what was mentioned above - casinos also request users to undergo KYC because of cheater and those that are trying to abusing the system to gain access to things that they are not supposed to. For example people abuse casino and try to abuse NDBs by creating multiple account and then tipping their main account with what they were able to get.

If you’re not willing to submit your details there are several other non-kyc site that you can use but since players know that bc can request them to submit their documents they shouldn’t complain, all they have to do is to comply and get it done so that they can continue using the platform. It’s as simple as that.