Well, for every Ameer and Rex Burkhead, there are dozens of 3* players that flame out and don't make it. This isn't a unique analysis, the odds of a 3* player making it onto an All-America team or becoming a top NFL draft pick is lower than a 4* player, which in turn have a lower rate than a 5* player. The reason why the NFL has a lot of former 3* players on their rosters isn't because star ratings are a terrible measure, it's because there are hundreds more 3* players to begin with.
The reason I assume Raiola wants to be surrounded by talent is easy to explain: the other schools that interest him are Georgia, USC, and formerly Ohio State. There's a reason that list doesn't have Boston College, Purdue or Washington State on it. This phenomenon isn't unique to Raiola - most highly ranked players tend to go to schools with a plethora of talent. I don't have to be his friend to know this, simply look at the schools he's interested in and ask yourself what they have in common: NFL potential and talent.