In the old days at work, a common expression was "Stay in your lane."
One of the things being taught was CQB, close quarters battle, room and building clearing. At first it was done with paint pellets called Simunitions, later they moved on to live ammo. The chorography involved was literally life and death for all involved, going through a door (aka 'fatal funnel') was a dangerous point and the team dispersed quickly according to a set plan to envelop the entire room.
It was NOT a good idea to lose track of where you were supposed to be. You could get shot by your own people. Thus "stay in your lane."
If your "lane" is singing, pontificating about politics is not in your lane.