That is a very good point, and good distinction between a Priest and any other preacher or minister.
Regarding Bishop Fulton Sheen, in addition to Mass, he also kept a private daily holy hour in front of the Blessed Sacrament.
A priest must first be holy, then his other works or projects will be guided by the Holy Spirit, not his own ideas, which could be sincere but confused without that inner core.
This is true. His book “Life of Christ” is beautifully written.