A priest is able to get to know parishioners from all over the diocese and he develops bonds of friendship that often last a lifetime. Secondly, there is the benefit of knowledge. Getting to know the personalities of different parishes and how they are called to live Gospel values is a very enriching experience. There is also the benefit of faith. No matter where a priest goes, there are always faithful people who come to gather around the table of the Lord.
Priests have to wear robes when saying mass even on a hot day.
A lot of churches have air conditioning, so this problem isn't as bad as you may think. It's all relative, anyway. You always have to return 10-20 phone calls a day. Part of being a priest is helping those in need, and this may require spending time on the telephone answering and returning phone calls. But whether it is scheduling a meeting with a bride and groom, making appointments, or even listening to a complaint, it is all done as part of the work as priest.