Everyone at their own level of understanding, this is normal.
For one - life is just eating, sleeping, copulating. And the other person understands life much deeper. But he will not be able to explain this to someone who has not yet reached his level.
It's impossible to understand life and its purpose by ourselves. It's the CREATOR of Heaven and Earth that gives understanding, and everything HE tells you/us about life can be trusted 100% unlike what humans who are under the influence of the evil/deceptive force that controls the world.
Listen to the audiobook Bible below to have better idea of the purpose of life and why the world was created by our CREATOR.
https://m.youtube.com/watch?v=EiXQmeuHTOY&list=PLIxhnx0kb33ORn8RQgHH54rdJMmqaRfmd&index=1