Nah, super focus is totally a thing, just not everyone does it.
My wife can't sit in a computer chair for 8 hours straight playing a game/editing a video/writing something/reading Wikipedia really hard, but I can.
And no, I can't control it so it's not a superpower, it's random enforced focus and it's only sometimes a helpful thing. Usually the work I do when doing it gets worse much faster and it does major damage to your body to sit in 1 position for that long not peeing.