There's still that old adage, why make it harder on yourself? As has been mentioned several times before, with current technology we could build an ocean liner on the top of a mountain and eventually get it to the sea, but why the hell would we? Or, to go back to the Statue of Liberty, they didn't build the whole thing in Paris and haul it to New York in one piece, they sent it over in sections and assembled it on site.
Just citing Trek's technological level doesn't really cut it, either. Folks still walk to the bathroom, they don't beam themselves there.