bad luck? we need to know more about who knew what. MH made the decision to be there at that time. we don't know what they knew about the risk.
I think the point being made is that other airlines were also flying through the same airspace - in fact there seems to be no concrete evidence that any airline was actively avoiding that area. More specifically, an SQ plane and an AI plane were in close proximity to the stricken MH plane when the incident occurred. As such it seems fair to say it was just bad luck the MH plane that got hit, rather than one of the other planes flying nearby. Unless you think they specifically targeted MH?