Nonsense. A push to the strongest man in the world can put them off balance and make them unable to do what they want.
You have unrealistic expectations of human anatomy and physics if you think pushing someone off balance like this wouldn't impact their ability to score. Especially if they are unaware it is coming.
Arms are used for balance. Having your arms tucked in is more unnatural than having them out for balance. Do you walk, jog and run with your arms by your side?
Doesn't stop alot of people missing the first 10 mins of the game, going to the concourses 10 minutes before half time, returning 10 mins in the 2nd half and then leaving 10 mins before full-time! 😂