So your point is that you should build something that you believe people will need even though this need/want doesn't yet exist. Ok, I can agree with that. But

So your point is that you should build something that you believe people will need even though this need/want doesn't yet exist. Ok, I can agree with that. But if you're going to run a company, you better build something people want now, or be able to make people want it, otherwise you'll go bankrupt.