[valarauca1]

I don't see how/why?

Generally speaking it is exceptionally rare for a star to point directly at us. This is to an acurracy of millionth's of a degree, as the straight line travel across interstellar space is massive. So getting hit with a GRB is like winning the interstallar lottery.

Secondly, if you cannot control it, or influence it. Worrying about it is just fantasizing. Humans tend to assume overly dramatic events are more likely then they actually are.