Football, you need to know what to do when they have 2 flankers out, or 3, or even on the rare occasion 4. Even though you practice it, you still have to run through it in your head on your own 1000 times before you'll remember it. Remembering whether to stay at home during a 32 dive but to blitz during a 31 is pretty damn difficult.
Not everyone can catch a ball, even people at the professional level can sometimes not catch a ball. It's called an incomplete pass and it happens 75 percent of the time. Catching a ball is a lot harder than you'd think when you have someone else trying to stop you from catching it.
Soccer players don't have the strongest upper bodies..or the strongest lower bodies. Soccer players really are just not that strong. My uncle played Defensive End for the University of Kentucky in the late 80s. He saw lineman do 700 lb squats with their hamstrings touching their calves. That sort of power just isn't possible with a soccer player..you just do too much running. Soccer players are built like marathon runners, skinny with not very much muscle mass so they can run for long distances without tiring. Football players are built like sprinters, with large amounts of muscle above and below to allow them to go as fast as possible, and hit as hard as possible.
I played Soccer as a fullback right up until Football started in the 6th grade. I played the sport, I just don't respect it..there's not much to it.