> it is their (US government's) obligation to reasonably check predatory fraudulent activity
Crypto, by-in-large, is not predatory. Most fraud checks are after the fact. Fraud can be triaged, but there is no getting around the reality that there will always be people who don't value risk properly. Again, this is not a problem for other people to solve.
This is not a reason to pretend it's a larger issue that will affect your gambling experience.