Human beings are put on this earth not knowing where we came from or why we are here. We do our best to answer these questions but there is no answer that is more correct than the other. The truth of the matter is we aren't meant to know these kinds of things.
Rumi points out many limits on knowledge that humans have in his works that I agree with. In one of my favorite poems by Rumi, "The Elephant in the Dark House", he points out that without sight of something our understanding of it cannot grow because of our limitation of knowledge. If someone has no knowledge on a subject then they rely on their senses to give them that knowledge, we aren't just born with it.
In his poem, "The Man Who Fled from Azrael", Rumi points out that we cannot escape, hide, or runaway from death no matter what we do. . I think it is a good thing not to know when our time will come for many reasons. Death is part of life and we are all going to die sometime but if everyone knew when it would happen it would create panic among everyone. I think it is a good thing not to know when our time will come for many reasons. It would also create carelessness among the world because people who knew that they were going to die soon wouldn't go to work or take care or their normal responsibilities. This would also create a lot of work and stress for other people.
Rumi also had a very good point in his poem "The Soul of Goodness in Things Evil". In this work Rumi points out that humans will do evil things in order to get some good out of it. Rumi says "Let poison but be mixed with sugar, they will cram it into their mouths". In this statement he is trying to get everyone to see that people will do anything to get some satisfaction, even if it means hurting another person.
Rumi's works have taught me a lot about why we don't know the stuff that we don't. Humans just aren't meant to know their future or what lies ahead of them and that's just how life is.