Of course most of the NFL isnt 5 star guys or even 4 star guys because there are so few of them. But a 5 star guy is about 50x more likely to get drafted as a 2 star guy. A 4 star guy is about 20x more likely. The percentages of 5 and 4 star guys drafted vs 2 and 3 star guys is overwhelmingly proof of correlation between stars and the resulting career