Why are so many women against men who actively try to look good?

It seems like with women they prefer men to be hot, but it has to be naturally hot. It's pretty obvious this is true, I mean I think it is widely accepted most men don't wear makeup. But even going to a tanning bed opposed to the sun or working out instead of hard labor or sports is considered unnatural to some girls and not as sexy.

Why does it matter how the end result was obtained as long as it was? Why does it really matter if a guy got tan by being under artificial bulbs for 15 minutes, or was out in the sun doing whatever? Why is it better for a guy to be a rock climber than a gym rat? Basically why is trying such a bad thing?