What's the incentive to share ideas? The satisfaction of getting them off your chest to people who build businesses off them? I doubt very many people would do

What's the incentive to share ideas? The satisfaction of getting them off your chest to people who build businesses off them? I doubt very many people would do that. I would only ever consider submitting my ideas to two types of people: 1) very close friends/potential cofounders 2) people who can help me build it (investors, etc..) I don't think this site has the right interface because people are naturally protective of ideas that can make money.