1. "Interesting" is way more about your own interests than it is about some inherent trait of a problem. Cultivate your own interests, live an interesting life, and build the skills that would let you contribute. That's a way better way of pursuing problems than waiting for 'the right idea' to land in your lap.
2. You should say "aw shucks, I guess I can't do everything," and then go back to work on what you're actually focused on. And maybe you tell someone you know who is interested in that domain that you've got an idea that they've probably already thought of.
2. You should say "aw shucks, I guess I can't do everything," and then go back to work on what you're actually focused on. And maybe you tell someone you know who is interested in that domain that you've got an idea that they've probably already thought of.