> So suggesting to bad entrepreneurs that their product is possibly failing because they haven't convinced people why they want it yet, is a bad idea.

When said this way, I don't see why it would be true. You don't give illiterate people different advice if they want to write a book: you tell them to read lots and lots of books. The fact that they can't, simply means that they can't, if-and-until they change themselves so they can.

Similarly, the fact that bad entrepreneurs can't convince people to want something, simply means they fail as entrepreneurs. They don't get a handicap lane to execute in; there's only one market. If they want to succeed, they don't need a crutch; they need to become better entrepreneurs.