Seems like that would be more the case for a team full of A.J. Browns. But the Rams who have gone from "We Not Me" to "We Then Me" the past couple years? I doubt it.Staffords mobility is not a issue.
The dude is a Dawg.
He has made so many ridiculous plays look easy it more than makes up for him not being the fastest guy in the world.
To me, he is the perfect QB. When he does good, everyone gets credit.
When a "running" QB does good its all about him. And other players get jealous. Thus, it takes from the team more than it gives.
BTW, I'd say Tom Brady was even less mobile than Stafford. He got and gets probably got more credit than any QB ever.