Heard from Rabbonim at a conference a few years ago:
The tasks of being the congregation leader in shul itself are menial. Most of us are well prepared to darshen on Shabbos, say a daf yomi shiur, pasken the average shailos that arise. What becomes overwhelming is the volume of personal problems that are best handled by someone with appropriate training. Congregants bring these issues to rabbonim, in the hope that we possess “daas Torah”, and that our counsel will resolve the issues. The trouble is that these issues are beyond anything we experienced in our training for rabbonus, and they are painful enough that they diminish our own ability to function in the capacity as a rov.
Now, are we at all surprised at the concept of “Rabbinic Stress”?