It's also what Sam Bankman-Fried and others did in exchanges that acted as unregulated banks.
The system is not perfect and there are many scandals but if you compare it to what happens in crypto exchanges, its a day and night difference.
Running a machine as intended and screwing up is different from pretending doing one thing and actually doing something else and screwing up. This is also why bankers and fund managers don't usually go to jail when they lose clients money. It's not illegal to suck at your job as long as you follow the rules.