People choose to behave foolishly all the time. It's not hard to follow a rule "I am not smart enough to guess profitable investments, and I should invest only in simple things like major investment funds". If you can not figure out this rule yourself, there are literally hundreds of "for dummies" books and thousands of advisors that would tell you. If you think you can do better, it's your choice. You may be right, or you may be revealed as a fool - in any case, the consequences are yours, not somebody else's.