The longer I'm inside my own head, the further I'm allowed to stretch my thoughts. When you're always bouncing back and forth between people for validation, every criticism to what you say is like an axe hacking off an original piece of the idea.
Curation is as important as creation. What do you think HN does? Or YCombinator? Or any important magazine or newspaper?
They curate things. They are taste filters. There's a hell of a lot of stuff on the internet and it's useful to know which things are actually interesting.