Everything is on the rise the past few months, thus any coin is "expensive" to use. I am still using Bitcoin for my gambling purposes, while sometimes I've also used Dogecoin, no other coins apart from these two. I'm skeptical about using BTC for any new deposits in casinos' due to high transaction fees. Currently using my balance, trying not to lose it since I can't afford multiple deposits.
I think pretty much most users are in the same boat as you are, we do not want to make a transaction to the casino because we know how expensive it is going to be to get our coins there especially if we only want to gamble with a small amount of money, and despite all of those inconveniences the gambling activity during the pandemic saw a huge increase, which is good but I wonder how much money was wasted on fees over those months when the price of bitcoin was increasing and creating a new ATH almost every day.