Football is full contact and rugby is not. If football was not full contact, then we wouldn't wear pads, would we?
Facts:
1. An average hit in football is equal to 98 g's (98 times earth's gravity). The hardest hits are about 150 g's. The pressure from an F-16 fighter jet is 10 g's.
2. If unpadded, a football player could be concussed, or die from the impact of a hit this hard.
3. The average football player hits with nearly a ton (2000 pounds, or since you seem to be european 907 kg)
I love facts, feel free to rebut, I want to know if I'm wrong.