Among the many reasons to allow the clergy class to die away is this situation: of necessity, clergyfolk consider Sunday a work day, all the while attempting to be seen as normal members of the church, to an extent. This dual reality sets up a conflict between de facto classes of Christians. (Of course there should not be classes of Christians, but in actual practice, these often exist.)
We try to treat preachers/ministers/pastors normally, like other believers, but it’s not always possible. We try to respect that their Saturdays are often given to preparations for Sundays—while some of us golf, grill, do yard work, go shopping, or to the park. And we try to respect that many of them take Monday off while we begin the work week. The weekly calendars simply don’t coincide—which wouldn’t be a big problem, except for the fact that preachers/ministers/pastors depend, to some extent, on the roles others (read: volunteers, “laity”) play in the workings of a church, and the rhythm of the week for the rest of us is different.
Clergyfolk need the rest of us, because of their official roles, to work according to their schedules. There is some pressure—because of the sense of authority inherent in positional leadership (which, again, should not exist but does)—to adjust our schedules to fit theirs.