My wife has a doctorate in occupational therapy and works as a hand therapist, when pay is the only metric looked at you really do miss a lot.
The body condition of construction workers, fork lift operators and even welders is worn down and in pain.
Not to mention, they have to live with unfair medical standards. When she does hand strength assessments for workers comp the number is based on natural average. So lets say a normal office worker squeezes on the test at a score of 100, a construction worker squeezes at 320. Workers comp says they can return to work if they can squeeze at like 120. Which terrifies the construction workers but they won't get any more time off.