As a welder I have invested in some pricey tools, Heli arc etc etc. Folks bring in cast aluminum or Magnesium I weld it up hand them a fair bill and they often reply it only took you less than an hour to weld it? My reply is “ Well it took me twenty years to learn how to weld it in an hour” I basically only weld now for friends and family, I just don’t need the practice.
We had a General manager at the Buick dealer I worked at for years. He would bring customers back to the service department and tell the customers "See these fellas? They are like whores, they turn a trick and get paid" LOL