I think it's more that the problem can seem deceptively simple because you're using the default system everyone's assumptions are based on and you don't need to understand the history behind it to have the basic banking experience. The average cryptocurrency booster hasn't studied the current system or its history[1] so it's easy to focus on the happy path and say you're making things easier until you hit a reminder of just how hard it is to stymie abusers when the rewards are high.

1. education from their fellow salespeople is typically worse, like getting medical advice from a health-supplement vendor.

> the problem can seem deceptively simple

Simple or not, the current solution is far from perfect and will be reinvented and will fail again and again until a better solution emerges. There is no way that the current banking/government/democracy/economy system will survive this century.