I still find that "wrenching" with hand tools gives me more pleasure than battery powered or air tools - however I have learned to wear mechanic's or latex gloves to protect my hands. Yet, there are some duties that are best done with air tools - die grinding, cut-off wheels are most useful when removing riveted ball joints; an air ratchet for bolts and nuts which have no room to swing a wrench or hand ratchet; an impact wrench for stubborn nuts; a cordless drill to spin off lugnuts once loosened. I like to "feel" the tightness of a bolt or nut with a wrench, ratchet or torque wrench - it's a sort of emotional satisfaction that one can only get with a hand tool (after learning from experience that making it too tight will wind up twisting it off and require an easy-out). The whole idea of "wrenching" is to feel at one with the assembly or disassembly.
However, if your income business is doing these operations, I'm sure these esthetics are long gone….