I also prefer the casino to pay that fee, especially when Bitcoin withdrawals are made and there's a lot of congestion because prices go up at that point but most casinos have had a low fee that can be paid, another option is to charge a fee but allow an internal exchange where you can convert it to a stablecoin. This is important but since I like to play at a casino where I feel comfortable , what I look for first is that Once I'm comfortable, I think a fee can be paid without any problems.
I don't know what to say on this matter because casino is a business platform and they will do everything to get money to run the system and in the other words, the gambler (s) would also like to withdraw the complete winning of the casino. And I believed every player or gambler would like the casino to pay the transaction fee.
Oh yes there are casinos that pay the fee while some are not. But those who didn't pay for the gamblers take small percentage from the gambler's account to process the transaction.