The title might be a little misleading. To not “worry” about something does not mean the pastor does not know about it.
A good staff will handle the minutiae of the ministry–the problems that arise that they are able to address without the involvement of the shepherd himself–in order to free up the pastor for his major assignment of church leadership.
The pastor who tries to micromanage his church is attempting the impossible and choosing to desert his post.
A wise pastor–who has the resources–can bring on staff capable and trustworthy assistants to free him up to do the three big, big things in his ministry: Preach/teach the Word, give direction to the entire church program, and care for his flock.