I think you're raising a good point there. I need to think about it more but I think you're right. It's good food for thought. On one hand I feel the need to stay in stealth till I have a working prototype to give me a headstart on the other hand if I would have been open about it from the moment I had the idea it could have allowed me to gather feedback from the start.
I currently still think I was wise to stay in stealth because my idea has no barriers of entry. However I am going to change my timeline and start being more open soon. I hope to have a private alpha in a few weeks time.