I think the reason why people consider ideas cheap is if it's just an idea. If the idea is the solution to the problem then that's what makes it a good one. The

I think the reason why people consider ideas cheap is if it's just an idea. If the idea is the solution to the problem then that's what makes it a good one. Then again that's just my interpretation of the large amount of seemingly-good startup advice on the internet. It also just makes sense.