Not necessarily true. Crypto casinos are not much different from fiat casinos.
If you play at a licensed and trusted crypto casino then you don't have to worry about losing your money and not being able to sue them if they scam you. It's all about how reliable the casino is and where it got its license from. Some crypto casinos are even safer than many fiat casinos.
A critical parameter in determining the safety of a crypto casino platform is its reputation. Some well-reputed options include Rollbit, Stake, Bk8, and many others. Depositing on websites like these can indeed alleviate our concerns, but as users, we may not be privy to all the hidden intricacies.
At the very least, a website with a solid reputation can provide security against unwarranted withdrawal hindrances when we secure our winnings. I believe that having a substantial user base will serve as a compelling incentive for them to act responsibly, considering they generate substantial revenue from their current user pool. Betraying the trust of users is certainly not the optimal solution. Thus, it's likely that platforms with a good reputation also maintain high-quality services.