About ten or so years ago, before my mother passed, I was helping her move some stuff around her house when a friend of hers came over with her grandson. Because I officiate, and the grandson played football, that must mean that I could relate to this 17 year old who was bemoaning that his coach wasn't calling colleges for him. I asked him what position he played, and he told me he was the starting center. The kid was maybe 6' and probably weighed no more than 200 pounds. I asked him where he wanted to attend and he said Notre Dame. When I asked about D3 or NAIA, I may as well have murdered his grandmother in front of him.
Long story short: it's not Harold Blackmon, or any HS Coach, that is preventing Marcus Freeman (or Brian Kelly at the time) from sitting at your dining room table.