You also have to recognize at its core mk is a very good fighting game. It's mechanics are very solid. You don't sell 5m+ on gore alone. These threads piss me off because mk's sales need to be explained as if it's some sort of peculiar anomaly. Like "how can this thing that's not Tekken be so popular!" the sales are high because it's a very good game.
You're the one who chooses to look at the situation in that light. The thread is asking why its more popular in this specific region not whether or not it deserves the popularity it has.