The NFL has done a lot to protect players in ways that does not change the revenues. Rule changes for hip drop tackles, late hits, body weight and strike zone for qbs. Concussion protocol even though it is a joke, kickoff rules. They will not reduce tv windows, that will only be expanded.
the sum of the rule changes has made things better at least for qbs. I remember watching inside the nfl in the 80s and it was all about the bad football due to backup qbs.