Thanks for being jerks and not actually helping cas bros.
Talking points that teachers would love
Cheapening regular season, potential impact to ticket sales for schools
Chances of a team in the 65-96 range actually making the elite eight/final four/championship
Time away from classes for the athletes (If the NCAA can use it as a talking point to prevent a D1 football playoff, you can use it as a talking point against expanding the dance)
Dilutes viewer interest in the early rounds of the tournament because it's less exclusive and the quality of play goes down.
I'm sure there's more, but that's a good start.