Many people think and believe certain things to make themselves feel better and after all this existence is all we know. Even know life is completely meaningless, it is all we have. Many people are very self absorbed. Also many people live in denial of the true pointless nature of this life, it is a coping mechanism for them to believe that us humans are important.
The truth is, that we are nothing. We are only here because people decided to selfishly procreate. Life is a pointless experience that we go through for the sake of it. We will all die and be forgotten eventually.