Uh-huh. Let's see all those soft keyboard jockeys be efficient at hanging drywall and working on a roof all day long with no air conditioning in Texas or Arizona. They won't. They don't have what it takes.
Not all of us "keyboard jockeys" grew up soft and sheltered in big cities. The dry heat of TX/AZ isn't that bad compared to the sweltering humidity of the southeast ;)
I'm from the bayou. I know damned good and well what I'm talking about. Roofing and construction for a living is not the same as occasionally going outside and sitting around in the heat.