There is nothing more important to us as living beings than that we have something we can describe as a soul that continues to exist after physical death and is everlasting. For without this, it is all for naught and there was no point in existing at all for ultimately it does not matter if we live for a year or a trillion years if we do not have immortality. And in fact not having such would really be the ultimate cruelty
It is difficult for some of us to believe there is life after death because it is all seems too incredible that we have a soul which leaves the body upon physical death and goes on to somewhere else. This is more so the case when many of us are wrapped up in our busy day to day lives with little time for reflection. Then we do not take time out to ponder how the bigger scheme of things might be because it has little bearing on our busy every day life with all its commitments, responsibilities, and distractions. If we were to put ourselves in a very dark room with no sounds or distractions when we aren't tired or sleepy, and engage in deep thought about the subject, then we may have more insight into what may actually be the truth. Of course the alternative, that there is no survival of consciousness, is all too hard to believe for many of us also.
If we possess souls and are on this earth to learn lessons and improve our souls, then why do we endure suffering for which we already possess empathy to a high degree for when others suffer the same fate? Unless something like karma can explain this, then this would in fact be evidence against us having souls and a purpose (and hence, life after death). If this is all orchestrated by some supernatural means, then surely this type of needless adversity could instead be made to happen to a person who needs to learn the lesson or improve this type of empathy. Or it could just be that whatever external influence there is is minimal or not exercised at all - because all living things are given free will. Or there could be another purpose for it that we don't see readily or not at all in this life; it could be something that has to do with future events.