He can in the sense that he is not expected to be on duty 24/7. The Church does not expect that of any priest, religious or secular. I think that the laity expects that, but not the Church.
For example, we have only one priest in our local community. He is at the parish only three hours a day. After that, he comes back to the community house. He has other duties, one of them is to be the cook and the procurator (does the shopping). There are four brothers who work with him at the parish. They run the parish until 5:00, but then they are off duty too. The parish closes. All evening activities are handled by the laity, not by the religious. The religious have Liturgy of the Hours, common meals, common recreation, studying, private prayer and manual labor when not in the parish. I’m there only 10 hours a week. The rest of the time I’m with Respect Life.
I have some very good friends at another parish. They are secular priests. They are off duty at 4:30. Only one of them is on call after that. The others are off. They have nothing left to do at the parish in the evening. The parish runs itself.
You’re right, the priesthood is not a job, it’s a call to ministry. But it does have time limits. That’s why we do have secular priests who have other jobs. Most of the ones whom I know are professors. Very few have secular degrees, though I did meet one in India who was a cab driver. That suprised me.
Fraternally,
Br. JR, OSF