“MDG: Rav Aharon Soloveitchik’s brother, Rav Yoshe Ber held it was assur. “
There could be differences in the circumstances that brought a different psak, but they might hold the same. The following is my conjecture to reconcile:
1) Maybe Rav Yoshe Ber was opining for the NYC metro area, with more Jews and a much higher chance of real tumat ohel.
2) Maybe Rav Aharon actually would advise kohanim to avoid even goish meitim LicHatchila, but my question was already a bedieved – that I really wanted to do become a doctor. I did not ask him if I should go to med school to begin with.
BTW, I’m not a doctor, although I seriously thought about it long ago.