"Coaches have said" ... coaches will say these things because the "new recruiting schema" takes away a lot of their power of persuasion, as they used to be grown men who convinced kids to come play for them and make the coaches gobs of money ... oh, and attend college, of course. They don't like it, so they'll portray it in a negative light. Now it's just more of "money talks."
The large majority of players weren't actually qualified to attend those colleges they attended, and when they did, they were mostly in throwaway majors (advertising, criminal justice, sports mgmt, etc.) if they ever declared majors at all (the new thing was to create a generic major - that went by different names at different institutions - that was "customizable" - it's a way to cover up a guy not actually having a focus toward graduation).
The coaches oft times sold these kids a bill of goods to feed into the kids' dreams. In exchange for that, the kids had a more-than full-time job as a football player (or insert sport here - even DIII field hockey players with no financial aid had to dedicate ridiculous amounts of time toward their craft), and "free stuff," like an education they likely wouldn't be able to take advantage of, some swag and "elite training" in a sport they weren't likely to pursue beyond their graduation.
Meanwhile, folks were making billions off their efforts.
Sure, there were success stories of kids who didn't take school seriously before college, and turned it around ... or kids who were able to complete real majors and do real positive things with that knowledge and experience post-graduation, but the system was set up to mostly disregard the academic portion of the student-athlete.
It's roughly the same now ... most of these kids are making some money, but not anything near life-changing money. Their education is just as important (or not important) as it was before NIL ... they're just driving a Tesla around school now, and have a few extra bucks in their pocket.