The question is not whether it's legal to defraud someone, but what a financial services provider's obligations are if their customer gets defrauded. The answer here is quite different for banks and brokerages than for crypto exchanges.
it really is not. no bank is going to refund you money cause you are a moron (we have all been morons, I am not trying to disparage the person that got scammed, I sympathize with him)
