But even if they felt they could, they wouldn't really have much to say about your shortcomings, because... they're not you. They don't know anything about what makes you tick, or the path you took to get to where you are now. And they certainly don't know where you'll be in 10 or 15 years, regardless of their current impression of you (+ or -).

All they have is this fleeting impression of how you "performed" in this one weird, pretentious moment. Which doesn't have much to do with anything, really.