Because no one knows what the hell Rodrique Wright is going to amount to. Some people thought he was a 1st round pick, but the reality of the matter was he ended up being a 7th round pick and there are a bunch of reasons why swirling around.
Besides Matt Roth, every one of our "big" defensive linemen who have ever played a down in the regular season are either going to be 34+ years old, a FA this offseason, or both.
Keith Traylor will retire.
Kevin Carter might consider retirement.
Vonnie Holliday is a FA and looking to cash in.
Jeff Zgonina is a FA and 36 years old.
David Bowens, who is not a "big" DL but is also a FA.
Besides Jason Taylor and Matt Roth, that is our entire DL rotation.
Do you really think it's a stellar idea to use a bunch of 7th round picks to fill those spots?