I think the point for people is that even if there are other coins that could be played, they still prefer bitcoin to be cheap, because why not? At the end of the day even if there are coins that could be free to withdraw and deposit, this is not an excuse for bitcoin to be one of the most expensive ones in the world. Pressure the casino to drop the bitcoin price to a normal place so that it would be fair to people who will play with bitcoin but also just handle it in a way that it would show the world that wolf.bet is not an expensive one and all of those will be easier.
I mean it is definitely not a horrible idea to have wolf.bet do a marketing campaign as having cheapest bitcoin withdrawal fee and minimum withdrawal, that is just what they could do to get some more attention. Otherwise if we just moved to altcoins at every time a place charges high for bitcoin then we are just letting them take the charge and that is just not what customers do.
Bitcoin transaction fee depends on mempool and how many waiting transactions on the network, in mempools. If Wolf.bet or any casino want to attract users by reducing the transaction fee or waive the fee, they will have to accept loss.
The loss can be small if transaction fee on the network is not too expensive but it will be too much to waive if fee rises to the Moon. Gambling sites are as same as crypto exchanges, they have to do many things for their operations.
About wallets, consolidate small inputs, maintenance and secure wallets, broadcast transactions, etc. They need to get fees and it is not realistic to waive all transaction fees.
It can result in complaints if transaction fee is not static but flexible with the network. Cheap today can be expensive tomorrow. Cheap sacrifice today from casino can be expensive tomorrow.