It is absolutely true that it is written above that passing KYC can cause problems, and if KYC is not required, then this can also cause problems. In short, it turns out that in any case there may be problems for the gamers. And there are only two problems:
1. There is no way to get the winnings if KYC has not passed

2. If you winnings and you have passed KYC then it fell under the control of the tax service and apparently will have to be divided- part government

. But this is in good countries where there are no gangs of extortionists. And in bad countries, with high crime, everything can be taken away. So whatever one may say this damn KYC is nothing but problems. And what bastard came up with it and now demands it everywhere?
If you've not directly dealt with casino daily operations, it might be hard to understand why they take KYC seriously.
They're there to make sure some underaged kid which shouldn't be gambling in the first place to bring back a huge sum that would be problematic, given he or she is below the legal requirement.
And then there's some people that prefer to whitewash their stolen funds.
Nobody wants to be involved in someone else's dirty affairs.