Don't take my observations personally. I'm just pointing out a common cause of wrist pain. In absolute terms, you may have very strong hands and wrists, which seems to be the case given your lines of work. However, in relative terms, you may have much stronger front delts and biceps than wrists, which is why you get wrist pain.
How much you use certain muscles or how big they are don't indicate a relative strength. For example, I have big, muscular legs, but my squat is the weakest of the three big lifts.
One last thought. If you haven't tried it already, buy or make a 2" or if you have big hands, a 2 1/2" thick bar and thick handled dumbbells. You can also buy them from IronMind. Train with them for all your exercises for 6 months. You won't believe the difference in hand, wrist, and forearm strength.