"worthless" is too strong, but I meet so many people that overvalue them that my language has become more about devaluing ideas than valuing them.

Look I'm not going to sign an NDA for something with no work done on it yet. If you want to share an idea and enrich the world sure that's fine. But most of the time while executing an idea, changes have to be made, assumptions weren't quite right, edge cases show up, the world was more complex than expected.