uh, you're joking right? OF COURSE they aren't hit as hard. They aren't wearing full body armor like NFL players. Not as strong or fast I think is best accounted for by the likelihood of far less performance enhancing drug use.
Actually, being hit by someone wearing full body armor would be a worse impact opposed
to someone with no protective equipment. When asked what it was like playing running
back in the NFL(Emitt Smith) replied"like being in a car crash 20 times in one day".
When i played Pop Warner football in the early eighties we were taught to hit with the
crown of our helmets. I seen more people get knocked the fuck out because some maniac
came running full speed with his helmet aimed at the opponents head. That's why hitting
with the crown of your helmet is outlawed.
The helmets they wear are hard plastic that can do severe damage to knees, arms, and
especially heads that's why the concussion rate in the NFL is so high.
As for the performance enhancing drugs all that does is enhance their ability to do more
bodily harm. I rather get hit by a 190 lb rugby player without gear on, then a 260 lb
raving maniac that runs a 4.3 forty juiced-up with 40lbs of gear on coming at me like a freight train. I curl up in a fetal position.