Michigan beat Texas (RPI 24, Kenpom 28) on a neutral court, which is a better win than anything Monmouth has, although neutral wins over ND and USC are pretty good. Monmouth has three losses to teams 200+ in both kenpom and RPI. If Monmouth were to get in over Michigan it’s probably a “story” thing, but unfortunately it’s not totally crazy and UM is in a position it has to worry about such things. And the tournament thrives on stories like Monmouth, while who really cares outside Storrs or Corvallis if UConn or Oregon State get in.
I do wonder if respect for Beilein could play a role.