Thanks for your detailed post. I now understand and see the difference as to what is usually "Beyond the Pale" regarding what schools are usually willing to do.
Your reference to JUCO as a form of D1 "rehabilitation" brings back memories. One of my daughters dated a guy in high school who loved playing football. As you probably saw many times as a coach, he was a player capable of more advanced play, but.... lacked the height / size for D1. He had D-3 offers, but could not afford to go.
Wanting to help him, I suggested that he enroll in his career interest of paramedic courses at a certain JUCO- then try out for the football team. I thought he would be a shoe in- right? After a year or two, he may have D2 offers and a scholarship.
BF enrolled and told me that the JUCO in the middle of the pine woods was packed with "rehabilitating" D1 guys. Very few, if any had sports performance issues. Rather, they were all academic failures, team / school discipline problems and likely other uhmm..... "undisclosed issues" of the more serious sort- wink, nod.
BF tried his absolute best and made the practice squad with the coach citing his height (disappointing again). There were so many D1 and D2 "rehabs" trying to get on that single JUCO team that they actually had a practice squad of sorts. I was stunned. I never would have imagined that a JUCO would have that kind of interest.
BF then ended up joining the Army as a combat medic.