At USNA, midshipmen have to balance academics, professional coursework and “military stuff.” What better way to show improved viability as a USNA candidate than to juggle academics, professional assignments and “NROTC stuff?”
Participating in NROTC will move a candidate forward in professional knowledge, and is a path to a commission, if presumably that is the primary goal. It could also become the preferred path because a good fit occurred. And, if the candidate does NROTC, it makes handling questions at nom interviews a lot easier than answering “why not NROTC.” Or making USNA Admissions wonder why.
Lastly, NROTC can be the source of a nom, never a bad thing.
I generally recommend participating in NROTC if available. It is certainly one way to learn more about the Navy and whether it’s for you, and you will learn if you can juggle it all.