Why bother reviewing their initial ideas at all (other than as an indicator of the aforementioned smarts & personality)? That is in fact about how we think of

Why bother reviewing their initial ideas at all (other than as an indicator of the aforementioned smarts & personality)? That is in fact about how we think of the idea, if it's still just an idea. Sometimes, as e.g. with a company like Bump, there's a real product to judge, but that's rarely the case.