I've put my body through all kinds of abuse to gain the skills and knowledge that I have. My job doesn't just involve physical labor, but a lot of mental skills that are needed to diagnose and repair.
Oh, look, Robert. The vibratory air tools and reaching over your head for hours at a time have meant that you've sacrificed your quality of life in being able to use your left arm like you did when you first entered into the job. You have a hard time walking on most days. Two bad knees from kneeling on concrete floors taking doors apart for years that you're now feeling pain in your hips for because you're compensating for your knees being bad.