I think the OP brings up a very relevant topic. The game has become more dangerous and more violent. As fans, we enjoy the hard hits and highlight reals on ESPN. But I do think the game may be headed down a slippery slope.
Players are becoming stronger and faster. Nowadays you have lineman who are just as fast as linebackers were in the 90s. When you have 300 + pound linemen clearing the way there are apt to be injuries.
Take a look all the way down to youth football. Some of these kids are so big standing next to some of their peers that you wonder how they can be the same age.
I don't know how to slow down the locomotive. The NFL is as popular as ever. Football, in general, is as popular as ever.
It is a violent game and it is easy for some to sit back and say bring on the blood and violence. That being said, that same sentiment might not hod true if it was your son, brother, friend on the receiving end of that highlight reel.
It really is a double-edged sword. How do you "fix" a sport that has become so popular.
Twenty years ago a lineman over 300 pounds was considered a monster. Nowadays, a lineman under 300 pounds is considered small. Add speed and agility to a 300 + person and you have a recipe for hard hits and injuries.
I had the opportunity to attend a Pittsburgh Steeler/Kansas City Chiefs game and I had field access during the warmups. I could not believe how big these guys were. On tv, the dbacks always look small. In person, they looked like linebackers.
I am not a small guy (6 foot 1) and I felt very small standing out there. These guys are elite athletes. When you toss in the training these athletes receive (compared to 20 years ago) the result is finely-tuned athletes who are strong and agile. Training is now even down to the pee wee level.
There will come a point in time where something needs to be done. Fining NFL players is a start but the problem is bigger than simply cutting down on hard hits in the NFL. What do you do at the college, high school ... and junior high levels?
You hear too many stories of former NFL players who are crippled in one form or another (headaches, back pains, bad knees, necks, etc., etc.) for the rest of their lives.
It's sad because many of those former players are not even 50 years of age yet.