I would imagine, if he were "a target," we'd have shown more than a passing interest in him. This staff has shown they'll put the full court press on a kid they really want. They didn't do that with this kid. Ergo, they didn't really want him.
We can't just randomly sign everyone in a 500-mile radius. We have to have a need they can fill. Stockpiling bodies isn't a sound recruiting strategy.
He's the highest ranked player in the state where the coaches have said they want to do a better job recruiting. He would currently be the seventh-highest rated prospect in our class. He can play either of two positions that the coaches have bemoaned our lack of depth. And particularly at DE we don't seem to have any other prospects even that interested at this point.
Either we have a few guys we really like that no one knows about or we should absolutely have been doing everything we can to get him. I don't think your last paragraph is applicable in the slightest.
Does the guy even want to play DE? If we have two TE in the class and are on the trail of #3, does it make sense to bring in another guy at that position?
Maybe he just didn't click with the coaches. Maybe the coaches didn't click with him. Who knows?
I'm just not seeing an end-of-the-world scenario because this guy didn't commit here.