Why? He’s a proven NFL caliber player with a SB ring! If he can provide solid depth and ST support, why would you want him gone just to be gone?
He’s far more proven than Smoke Monday
Easy. He's a known commodity. If he were to be cut after rookies have been in camp only a week, it would be a great sign that one of the rookies, for example Smoke Monday, has shown enough to allow them to let go of Sorenson early.
You want him gone because despite being NFL caliber (your words), he is
1. a more expensive player than a rookie
2. a known commodity who is either at his ceiling or declining
3. holding a roster spot that could go to a more talented, but perhaps green, young player
4. apparently very annoying to Mathieu, LOL.