Because the only way anyone can be allowed to do what they want with their money is accepting that you cannot guarantee zero people will get scammed. If you le

Because the only way anyone can be allowed to do what they want with their money is accepting that you cannot guarantee zero people will get scammed. If you let people buy shares, some will get scammed. Ditto bonds or gold or real estate etc. So either you give people zero choice or you accept cases like this will happen. That doesn't mean you don't try to minimise it or don't prosecute people or whatever.