Should We Go for It on Four Than One?

i've always been curious as to why teams don't have those in game specialists there, because it seems like such a blind spot for a lot of these coaches. And when i watch it on my t v, it's icante. It's easy for me to make that decision because i don't have the pressure, the atmosphere, all the things that are going on on nfl side lines. I mean, it is organized chaos. So it's almost like why not outsource those tasks so that the head coach is just in charge of the time? If you're the play collier, also calling the plays, and not having to worry about, should we go for it on