Collective wisdom is about our capacity to recognize interdependence and to make decisions demonstrating that we have a stake in each other, that we can indeed care for each other and the physical planet we share.
If I were to start taking care of my grooming, I would no longer be my own self... so the hell with it... I will continue to be unconcerned about it, which surely has the advantage that I'm left in peace by many a fop who would otherwise come to see me.