I recently got talking to a long term payer who when I asked him why he got into MTG told me that he was heavy into the FPS shooters of the 90's but as a teenager developed a tremor in his hands that made dexterity-based FPS games impossible for him to play competitively.
He told me that he read somewhere that MTG is not a game based on dexterity and he got curious as to what that meant and got into the game from there.
I'm curious as to where this phrase originates from. I have heard rules experts quote it before. It seems rather famous.