The main advantage of crypto based gambling is that many countries have banned the deposit of money to online gambling sites and this will open up the market from those restriction but the sites in this space have more limit than the fiat based sites which makes it less attractive, we need more competition in this market.
If gambling has been declared illegal in any country then people of that country should refrain for gambling at all and find some other method to spend their time online or offline. Playing with crypto to appease their gambling appetite is going to land then in trouble once they get caught by authorities. But then again most authorities dont care about crypto related stuff.
There is already a large competition in the crypto gambling scene. I dont think we need more.