Let's be honest, money laundering is the best thing that can happen to a casino and there is where most of high rollers comes from. I have seen some rollers in the past that runs some huge scams and then go to the casinos to play with the scammed money and with that justify where they get the money from after hitting some huge wins.
You have to prove that because you say to use the most that mean the majority of high rollers, if that is the case then the casino is in big trouble for having a weak system to detect money laundering among their high rollers
Nowadays most casinos has KYC, but i don't think that is enough to stop the money laundering, what casinos should do is to investigate the source of the deposits to fight against this illegal activity, but that will not happen because is a win-win game from them.
That's too much work for them if they have the full details of these high rollers who are suspected of the mastermind of scams and just trying to use casinos then just one alarm from authorities and they can easily hand over this information.
So, what do you say, do crypto casinos really care about money laundering?
The fact that they are already doing KYC is already enough they are already compliant and they will cooperate or if one of the wallets that these high rollers gets an alarm for, let's admit high rollers are their lifeline they don't want to discourage them from playing on their casino, for fear of looking for other casinos.