Comment by igorzij

Because that's what people go to HN for.

If I'm building something new, or launching a startup, there is not much benefit from encouragement. I don't want to hear "well done, this is so cool".

I want to know as many flaws that I might have overlooked as possible, as quickly as possible - so that in the (highly likely) event that my idea is fundamentally flawed, I can move on to smth else instead of keeping wasting time on it.