Football is a dangerous game by design. If you want player safety, play flag football.
I would encourage you to think about what you're advocating here. What's the objective, to create a game that is dangerous? In that case, why not give them knives, too? Or guns?
I dispute the idea that what makes football fun is the prospect that someone will be seriously injured during the game.
And I dispute the premise that, in order for the game to have any interest or entertainment value, we must ignore player safety.
Small minds insist that only one thing can be important. Football fans value tradition, the vigor and energy of the game, a sense of fairness, AND player safety. Once we recognize all those values, the tricky part is figuring out how to balance them together. Figuring that out is how the game evolves.
People throughout the game, at every level, have begun to promote player safety, and I think that's a healthy development. To say it's either old-school or flag football is a false choice that fails to take seriously the hard work of balancing multiple dimensions of the game.