It seems some Galileans had been offering sacrifices in the temple when Pilate's soldiers stormed the place and killed the worshippers right there in the sanctuary. Jesus doesn't miss a beat. Those people didn't die because they deserved it, he says not because they were worse sinners than any other Galileans. And the same could be said about the eighteen people who were killed the other day when the tower of Siloam fell on them. They didn't deserve it either it was just an accident.
Life is precarious life is fragile like that.
You just never know when the end will come. That's why you had better repent while you have the chance. Turn your life around in other words. Use the time you are given wisely well fully generously. It reminds us of what we all know, but don't like to think about very often.