Head in the Clouds

Why is it always a bad thing to have one's head in the clouds?  In winter especially, though not exclusively, folks in Sewanee have their heads and their every-other-parts in the clouds quite often, sometimes even all day. 

In my experience, clouds do not make me feel flighty or unrealistic or spacey or out-of-touch.  On the contrary, I feel in touch, energized, and turned indoors -- to work, or create, to read, or bake, to wander and wonder at the inward turnings of the mind's world each of us carries.

We share the cloud, but not what we make of it.