The meaning of life is to reproduce, which implies to survive until that age at least. Without this, there would be no continuous life and the "meaning" question cannot even be asked, as it's a question asked by living things. Or only one living thing that we know of.
The why question has no answer nor will it ever have an answer. Life doesn't need justification or orchestration. It's a freak accident of molecules. It could have never happened and it can end by means of a disaster and the universe will happily continue without it.
As to what a human can/should to with their life other than not dying and trying to reproduce, that's an entirely cultural question. Cultural is a fancy word for: we made it up.
The why question has no answer nor will it ever have an answer. Life doesn't need justification or orchestration. It's a freak accident of molecules. It could have never happened and it can end by means of a disaster and the universe will happily continue without it.
As to what a human can/should to with their life other than not dying and trying to reproduce, that's an entirely cultural question. Cultural is a fancy word for: we made it up.