I guess the test as to whether or not this is a problem, is when the physical symptoms of anxiety, (they can be so severe they can mimic a heart attack sometimes), affect the safety of your flying.
I think in both the airline examples the first officers lost their medicals.
I have no doubt that the PPL I flew with who held an IMCR would have not coped on his own.
He displayed panic symtoms with me flying as P1 (but that doesnt surprise me many do
(only joking)
Should he carry others using the privalages of his IMCR then the answer has to be a definate NO. I would not be happy with him flying my family.
Should he fly VMC only? I would still have my concerns although he is a very detailed but over worrier and cautious pilot.
Pace