re: In football if the defense had 12 players instead of 11...

Offenses are getting better for a lot of reasons.

#1 they a literally getting better. Better and more accurate QBs, receivers that make insane catches and are incredible athletes. Coaches that find every weakness possible, etc.

#2 defenses are getting shittier. The DEs don’t contain. No one knows how to tackle or take a proper angle. It’s awful to watch.

#3 Holding by WRs and the o-line is out of control. And has been for many years.

Unless coaches want to focus on #2 and force the higher ups to enforce #3, the scoring machine teams aren’t going anywhere.