From Jesus was not a fatalist:
The Pharisees in the time of Jesus were fatalists (see Josephus on this). Fatalism seems to be the default human belief. We find it as far back as Job. Job’s friends try to explain to him that things just do not just happen for no reason. If Jesus was not a fatalist, we would expect there to be some sort of confrontation about this. In fact there is:
Luk 13:1 There were present at that season some who told Him about the Galileans whose blood Pilate had mingled with their sacrifices.
Luk 13:2 And Jesus answered and said to them, “Do you suppose that these Galileans were worse sinners than all other Galileans, because they suffered such things?
Luk 13:3 I tell you, no; but unless you repent you will all likewise perish.
Luk 13:4 Or those eighteen on whom the tower in Siloam fell and killed them, do you think that they were worse sinners than all other men who dwelt in Jerusalem?
Luk 13:5 I tell you, no; but unless you repent you will all likewise perish.”
Because the Pharisees and many people were fatalists, they were looking for some sort of meaning in the deaths of the innocent Jews by both Pilate (volitional murder) and the tower of Siloam (accidental death). A Pharisees would have decried the dead as terrible sinners, but Jesus does not do that. Instead Jesus seems to mock that position.
In Jesus’ answer to the question, he gives a non-answer. He counters the prevailing reasoning and then uses this event to illustrate future death. Jesus was not a fatalist, sometimes things just happen. But Jesus also tells us, there will be a time when future people perish and this will be for a reason (they do not repent).