Agree, deep enough and need to see the vastness of the market, instead of putting in a narrow mindset and rejecting it from the first few frictions but start-ups should still leave a bit of an optimistic attitude and should not be overly thorough because the obsession with every detail affects a lot of startups, risk aversion is fatal for too many people while they don't realize the success rate is still relative. Insufficient capital can be called for and there are quite a few funding programs for startup ideas, convincing enough will allow successful capital raising.