Sorry to sound pessimistic, but how much could you change in a 24 hour hackathon? I've seen a surge lately of hackathons and they seem to discredit the entrepr

Sorry to sound pessimistic, but how much could you change in a 24 hour hackathon? I've seen a surge lately of hackathons and they seem to discredit the entrepreneurs that spend weeks, months, and even years on their projects. Furthermore, they perpetuate the notion among non-techies that you can build the next google or facebook in a weekend.