I think all jobs require problem solving to some degree just that some jobs are easier than others and others while not necessarily easy are sufficiently well d

I think all jobs require problem solving to some degree just that some jobs are easier than others and others while not necessarily easy are sufficiently well defined to enable a worker to develop expertise in that area. And with expertise in a field problems are often solved intuitively without going through all the "problem solving mechanics". Getting to this point where problems can be solved intuitively can sometimes take years of study and practice. We can look at this as an investment. A person invests time and energy in wiring his or her brain to solve a particular set of problems and after achieving this goal the person is left with little desire to repeat the process for another problem domain. A doctor may apply problem solving skills to diagnose and treat a rare disease but may not be able muster the effort required to learn photoshop. It's not due to a lack of problem solving abilities but more of a desire to step not out of their problem solving comfort zone.