The NFL is filled with some of the biggest, strongest and most athletic human beings on Earth, but it's not the biggest, strongest or most athletic players who truly dominate on the football field -- it's the ones with the most technical proficiency who tend to dominate on Sundays.
It's not to say these players aren't some combination of big, strong and athletic, but it's that those factors aren't as big of differentiators in the NFL as they are in college, high school or peewee football, which is why technique is so much more important in the pros than the lower levels.