I've always found doctors and psychologists to be the natural born enemies of pilots. One way or another its their job to ground you
That's a bit of a wide sweeping generalisation.
some obvious surgical scarring I had
I recall a renewal done shortly following a period of hospitalisation which had involved a biopsy on my ankle. The GP DAME, whilst attaching and removing ECG leads to the foot, chose not to see anything of the very obvious red-purple discolouration radiating from the not yet healed incision ... probably had something in his eye on the day, I guess.
Two examples of the other side of the coin -
Ralph Caponi. Originally a pilot (ANA) then GP and, eventually, electrical engineer. As a DAME he was faced on one occasion with getting a well known character back into the seat after the latter's being sidelined for some considerable time post motorbike prangs. In essence, Ralph just harassed DCA until they gave in on a "he (the pilot) can do it" basis. Mind you, the test was in a DC3, mates just about had to carry him up and down the stairs and the assy was a bit of a labour .. but determination was always one of the good chap's attributes.
John Colvin. The main man in the DAME eye game some years ago. Very much a pragmatist and on the side of the pilot. Helped me out with a minor muscular eye problem which embroiled me in a dispute with the MBF. Rode jumpseat on the Boeings a few times (I suspect he always avoided the cabin where he could) and always the thorough gentleman.
A couple of CASA DAME bosses in recent decades (whose names elude me just now), likewise, introduced/championed changes better to facilitate pilot certification.