That's what happens when college sports provides a free minor league for the NBA & NFL. It would be wonderful if there was somewhere to go, if you were a talented 17-yr-old but not college material. But there was never any reason for the pros to establish anything like that (No, I don't think the G League qualifies; that seems to be mostly for more experienced hangers-on that might fill a 10 day contract if needed). Bob Knight, who was an ass but at the same time usually the smartest guy in the room, suggested that very thing. Instead, like you said, the education becomes an afterthought. Getting a free four year education, no student loans hanging over your head for 20+ years---big deal.
I'm all for some sort of stipend, like was suggested many years ago. But the advantages that were there all along are mostly appreciated only by some of the non-revenue jocks. That's why a Guy like Rashard Griffith, who went back & earned his degree, should be held as an example.
You'd be amazed at the number of FB & BB scholarship athletes who are absolutely certain they're going to enjoy a long pro career.