College hockey is becoming more and more attractive to these kids. Play a year or 2 in the USHL, and go play D1 for 4 years or less while getting an education, it's a sweet deal.
Graduating at 24 from a canadian university doesn't sound as fun as graduating from from a top-tier school in the states at 22.
If hockey is your life, OHL is the route for you. If education is important to you, the US college route is highly attractive.
Don't think for a second these kids parents aren't involved in some of these choices.
BUT the best route to the NHL, is through the CHL, there's no denying that.
I totally understand it for kids who needs time to develop physically (kids like Katzin/Bray), but Fitzgerald, Vandenberg, Valentini, these kids are built for the OHL.