And the point is that the object played in "American Football" is not a ball. Balls are round. It is egg shaped. The object played in "Football" is a ball.
Describing the ball in football as an egg just makes you look like you can't see properly.
The opposite would be foot ball. Although both are petty as anyway both are called it because it is played on foot with a ball. Not because you use your foot to kick a ball.
And the point is that the object played in "American Football" is not a ball. Balls are round. It is egg shaped. The object played in "Football" is a ball. Describing the ball in football as an egg just makes you look like you can't see properly.