Casino won't gain profit without a house edge.
That's the reality, even 1% house edge which is low but they are making huge profit if the total amount wagered are bigger.
It's their advantage, and it's where they make money operating the casino.
If it does really exist that casino won't last long. It would attract many gamblers but I don't suggest playing there. Something like a 0% house edge for a limited time or event is enough.
Or maybe a scam casino only, I don't see a casino with zero house edge that are successful and popular in the crypto world, most of them has house edge.