That was my point. Why would you get Davis or Howard (racing tires and a spoiler) if you don't have an engine (a QB who will get them the ball).
I like Tyrod, but he isn't much of a pocket passer. He would not be able to spread the ball to Sammy, Davis, Howard, Clay, Shady, etc.
Having great receivers doesn't automatically help the QB get better. Getting Terrell Owens didn't help Trent Edwards. The Lions drafting Charles Rogers, Roy Williams, and Mike Williams (all top 10) didn't help Joey Harrington. Tyrod, like EJ and Trentative, is too reluctant to let the ball fly.