Way I see SE is this
2 guys get into a meeting
Guy 1: I have an idea for a game.
Guy 2: Okay what?
Guy 1: We should make Final Fantasy 15
Guy 2: Yes, we should, I'll announce it in the morning.
Guy 1: Announce it? But we haven't done anything yet I've literally only just come up with the idea and the idea I have, it will take at least 4 years to have something ready to present.
Guy 2: That's fine, no one will mind. We have a barage of IOS games to release before then so it'll be fine.
Guy 1: But-
Guy 2: Trust me on this, it'll be perfectly fine.