True but of course maybe some gambling platforms just prioritize those alts than BTC which doesn't make sense. Also, fees aren't even an issue nowadays so BTC should be always included to all of the gambling platforms. Imagine, you're a btc maxi and those gambling platforms you've checked doesn't have BTC option, it's a major turn off to be honest. And besides, there are many people who still prioritize BTC gambling than stables, it's like perpetuals, they risk BTC more because of high-risk high reward, not stables.
I'm with you, it's a thousand times better to be in a casino that accepts BTC and cryptocurrencies, that doesn't accept BTC and alts and stablecoins , I don't like it, one has already become accustomed to betting with BTC over the years, I think some will see the good in it, I don't, nothing like betting on sites that accept BTC.