You're kinda cherry picking.
First off, there's a difference between 2 stars and blue chippers (we've never gotten one - except maybe Kyle Williams?). Guys like Bernard Pollard, Stanford Keglar, Anthony Spencer, Cliff Avril, Ricardo Allen....were 3 star guys, but had offers from programs like Michigan, Michigan State, Ohio State, Clemson, etc. Those are very solid recruits.
Most of our recruits now don't have Big Ten offers, even the 3 star guys. There's a big difference between a "low end" and "high end" 3 star recruit.
A lot of our NFL guys were pretty solid recruits. Yes, there were some that were not, but that happens everywhere. #1 Clemson has a WR who was a walk-on that starts as a redshirt freshmen. I don't think they're going to change their recruiting strategy to focus on walk-ons because they had a success with one though.