My reading is that (a) systemd can't read home directories on the file server, because clients understandably don't get root permissions there; and (b) the reas

My reading is that (a) systemd can't read home directories on the file server, because clients understandably don't get root permissions there; and (b) the reason systemd was trying to look in those directories is that they contained (non-root-users') FUSE mount points.