Being prepared is very different than sending in an army of riot police in a highly aggressive stance before the protest even started. The response came nowhere near matching what was a peaceful assembly.
I’m assuming you haven’t watched the videos, and that’s okay, but if you had you would have seen no aggression on the side of the protesters. The aggression came from one side and one side only. Video shows protest organizers wearing day glo vests issuing directions to the protesters to clear the way. The way that they were provoked by aggressive cops, I give them a ton of credit to the protesters for not escalating things. The cops arbitrarily left around 7p so there was clearly no actual threat. At that point, some protesters returned to the south lawn and assembled peacefully. Today, without the spectacle and publicity stunt, people once again peacefully assembled on the south lawn.
I understand your viewpoint, but in my opinion, the response from UT was way out of whack and actually risked ramping up the crowd into violence which, if you’re cynical, you might think was the intended outcome to score political points in certain circles.