this is nonsense, IMO. Unless he has regressed due to injury (then PUP or IR him or whatever) he is the 4th best safety on the team, with the guy from KC the seemingly only competition. Marlowe is 5th likely. Hamlin started a ton last year.
the inly way he dies in a game is if he gets hit in the exact same spot with the same awful timing again. Same risk as any other player. At which point NFL prob mandates the same sort of extra pads lacrosse players now wear (nfl and football should do this anyway, IMO).