Just musing, re : Buffalo. Crowd control techniques haven't changed much in 1,000 years

For a number of years, I worked in a facility adjacent to another facility that hired and trained police recruits. We shared an open space with the other facility and often observed the trainings when we had occasion to be outside, going home, etc. Usually they started with basic physical fitness. Lots of exercising, some vomiting now and then, the usual stuff. But even early on, they incorporated close order drills and techniques. Advancing in unison. Hoorah! Pushing back, shoulder to shoulder, shields up, although the shields were initially imaginary.
Watching vids from Buffalo, it struck me that things had not changed much since the middle ages. Shield against shield, shield against whomever. Saxons or Danes never stopped to aid the wounded. They only advanced or shattered. This is how our LEOs are trained. It is what is expected. So when a 75 year old man is felled and bleeding, nothing changes. This what is expected. This is what is indoctrinated. This is what WE pay for.
Crush "the enemy" and let the medics follow later. Seems like we would have learned better techniques by now, at least against our own citizens.