posted by AutomatikMitchell was spot on, I'm sure most logical fans would agree.
Regarding Shazier, really sucks...I doubt we see him play again. He had spinal stabilization surgery, involving hardware. I don't see how you can come back from that.
Yeah, right now, I think the more important concerns would be "be able to walk and/or lead a quality life in the future", rather than "play in the NFL". Hell, even if this was directly comparable to Tommy Maddox like people were guessing afterwards, Maddox was a QB. QBs take hits, but not every offensive play. Shazier is a LB. Every single play, he'd either be hitting someone or at least putting effort into hitting someone, making it less likely he'd be able to come back even if the injury was equal to Maddox's and not worse.