We all know strength and power have nothing to do with athleticism:
"the physical qualities that are characteristic of athletes, such as strength, fitness, and agility."
I'd actually go as far as to as say many of the American sports require more athleticism than football. You can compensate for shitty genetics by being brilliant on the ball. Look at Sneijder. Being able to take a corner kick more accurately with your wrong foot than the rest of the squad isn't going to compensate for your lack of height, pace or strength in American football.
You'd seem fairly uninformed for someone that claims to know "for a fact what sports scientist unanimously agree on" to think it's a 50-50 as to whether or not they eat fried food and creamy, chocolaty desserts on a daily basis.
You're aware there was no "peak performance" necessary in pre season? This isn't their in season pre game meal.