that's not the main reason for everyone
some use a VPN for privacy concerns, not to avoid restrictions for streaming or whatever
there are many different kinds of users around.
one more time: it's better to avoid vpns if you plan to gamble on KYC casinos.
But how can anyone looking for privacy gamble on a KYC AML compliance platform, once you sign up on such a platform to gamble you should know and be ready to provide them with your KYC document anytime and that is no longer privacy, choosing to now use VPN to hide your ip address on such casino is needless at this point unless you are prepared to take any problem that may arise along the way while gambling on that site.
I for once will only use a VPN to access decentralized platforms only, if and where those platforms are restricted to my original IP, but aside from such situations, I try as much as possible to avoid VPN usage.
VPN usage has other reasons besides privacy (online protection in some hack cases, as an example)
and maybe you can do kyc but don't want to leak your IP, or you kyc with an address which is not your main one
many possibilities
playing devil's advocate a bit here because I agree with you that with gambling platforms it's probably better to avoid vpn, idk
I find it troublesome to keep turning the VPN on and off.