Its curious that you say you need way more elements to be a good poker player than SC2 player. You definantly dont need twitch reaction or strong motor skills / hand eye coordination to be a top poker player, just as you dont need strong basic math/probability to be a sc2 player...
BRM is one example, but you could even apply a basic version of it to a simple stop-loss laddering technique. Math skills you dont need in SC2, but fast decision making you do (even when the clock is called with you holding a straight on a flush draw, you still have more time to react to that than an unscouted proxy stargate).
I would say more people would be capable of becoming profitable online poker (5% rake) players than excellent (high diamond+) sc2 players. Math, reading people, dealing with financial pressure and considered decision making you can teach and learn with experience; fast, accurate control and reactions most people will never have, and progressively lose for every year they age past 30
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