Shooting is fun. Cleaning is a chore. If i felt I had to clean my guns every time I fired them, I wouldn't shoot them as often. Or I'd only take one gun to the range at a time.
Where's the fun in that?
I don't think a pipe wrench needs to be taken apart, scrubbed, and oiled before it's put away either. And I have wrenches and other tools that were passed down from my grandfathers. Working things don't have to be kept in LNIB condition to continue working.