Why do pro-gamers spam hotkeys?

[Edwardo Piet]

I've heard a pro gamer explain that doing this early on in the game keeps your fingers moving and more prepared for when you actually need to execute lots of commands later in the game

Ah! So that is why then. I heard this from players but I never heard it from one of the actual pro-gamers themselves. I wondered if it was a rumor and people were just guessing that was why.

So it's to keep them alert is the best way of thinking of it for me. Easier to stay fast from the beginning than speed up when required, I guess.