I don't think it's that. Everyone assumes they're smarter than the average bear, they can beat the odds, and they can be the outlier that succeeds. By that same token, there's certainly no harm in people stepping up to say "hey, yea, that might not be the best idea. Technically it might work, but have you considered the long term effects of XYZ".

As the demotivator says "If you try to beat the odds, make sure you can survive the odds beating you."