I think the assertion is there has to be a drafted team that is a solid core before you add that QB that puts you over the top. While the Bills were drafting garbage, teams like the Saints drafted starters over the past 4 years. So when they added Brees and Jabari Greer, they complemented the solid team they already were.
You just can't keep missing on complete drafts. Despite being one of the least talented teams in the NFL, the Bills have 1 contributor from the 2010 draft, and a TOTAL of 14 contributors from the last 8 drafts (Spiller, Wood, Byrd, Levitre, McKelvin, Bell, S. Johnson, Lynch, Poslusny, Whitner, K. Williams, Parrish, Evans and Kelsay) . And out of these, only Lynch and Byrd have made the Pro Bowl. NOT ONE of these players is an indisputable stud that makes us better than anyone else.
That just can't happen. Our drafts must be better or we're doomed no matter what trades we make or free agents we bring in.