If you create somethibg, you decide what happens to it. In the case of IP, this should mean you decide whether or not you want to release it/tell others about it. But an idea is not a physical object. Once you tell somebody else your idea, they can tell somebody else with no loss to yourself.

It's like lighting a candle. If you create one, you do not have to share it with anybody. But once you do light somebody else's candle from your own, they are now free to light anybody else's without taking anything away from your candle. That's how ideas work.

The only reason IP law exists, is because people have decided that profit might be lost if people share your idea with others. We are artificially stifling the spreading of ideas from person to person, because of profit. This is a tragedy.