[machbio]

there seems to be no analysis on why the size and dimension of the ball is chosen - very few games have balls that are not spherical.. seems too much human intervention in generating the Sport

[dosshell]

They say you can use spherical balls too (to the right in the rule image). It seems to not be important for the game.

[pbhjpbhj]

Rugby balls add a deal of randomness; are much harder to drop kick and grub-kick.