UAS URNU and UOTC are not about being Officers, or even military. They are just Seacadets, Army cadets etc for kids that have left home.
They are about drinking and having fun whilst wearing a snazzy uniform in the hope that in later years the people who joined them remember the military fondly when maybe a few of them just might have some actual clout.
The idea that they could replace IOT is frankly hilarious.
Even Dartmouth has some ability to install a little bit of military bearing and elementary personal admin skills.