You call it "toughen up" I call it better training. Today in sports, we supposedly have the best athletes, the best trainers, lifting, nutrition...why then are we inodiated in all sports with injuries?? I certainly understand concussions are real and we simply have much more awareness of them now more than ever. But a couple of simple things on concussions, why aren't NFL players required to wear mouthguards? That limits concussions. Also, we've seen guys like CJ Stroud and Tua get their heads slammed back into the turf for their concussions. Anyone that played football knows everyday in practice you did neck stretches and strengthening, now they even incorporate weights too. So how are these guys not able to stop their heads from being slammed back? One last thing on concussions, why do helmets pop off so easy now? Again, I know when I played, my helmet was not coming off. It was so tight, and then with the chinstrap it was snug and not budging.
And you use the terms "some" and "many" in your arguments...that's not all. Yes, of course you're going to have "normal" injuries that have no rationale for practice time or hard hits. Please be at least a little understanding of what's being discussed.
If you could drop the NFL injury rate by say, 15-20%, that would be huge. There is no doubt that the less practices and contact in practice that was negotiated in the last CBA has had a dramatic negative impact on player injuries. Players are simply not football ready for the season to start.