Is Head Coaching a full-time job?

jahsoul357 said
Super Bowl winning head coach John Harbaugh. Super Bowl winning head coach Mike Tomlin (Master Motivator). Jim Harbaugh.

Combined Record : 22-9

They are not just motivators they are X's and O's guys as well all of them were position coaches for quite a few yrs BEFORE they were HCs.
My point is that successful HC are not just motivators they are good at X's and O's and not JUST ST's