That's not what I meant.
The medical community didn't know everything it knows today, but there was some information coming to light.
The players allege that the NFL knew some things and didn't properly act on them. If that's not true...
Also they are saying in part, that although there was certainly a "legal" right in their contracts to get second opinions, sit down because they didn't know which team they were on or what their name was, etc...that they were, nonetheless coerced to play through injuries. (I don't know about THIS suit, but that's a contention in most of them)
At the very least, even if the NFL knew nothing and the players knew what they were getting into, the NFL should be taking better care of its players after they retire. Healthcare coverage should be complete and unlimited. The NFL is without a doubt rich enough to do so, and it wouldn't have been without those players.