Crypto casinos that cover all expenses for their players are still in a minority. You are right about that. Most platforms require that clients pay at least the network fees. But it's not unusual in the fiat world of online casinos that you, the player, isn't charged any withdrawal fees. At least those online casinos I have registered at always paid everything from their pockets.

I don't think it's asking too much to have casinos cover those fees. Players are already gambling with their money there. They leave millions in profits for the casino operators. At least cover their fees when they are charged for everything else and they make you a lot of money.