Probably a good time to mention CLEARING. That's what we call looking outside for other airplanes while we are flying along.
As demonstrated by this F-16 pilot, you need to SEE the "bad guy" or he can hurt you. Can't do that without moving your head around.
I don't even remotely expect you to look 360degrees like this guy. However, with all our yanking and banking, we definitely need to be looking around for other airplanes!