[mnarayan01]

In as much as it has any real purpose, I would say spamming hot keys is more about making sure your hands/controllers are properly positioned. And then making sure of it again. And again.

Also, given the above, spamming hot keys is just about the only physical action you can take using your hands to expend nervous/bored energy.

[prawks]

Agreed. Think of it like an American football punter doing high-kicks before a punt.