I agree with the first part, not the second. It is fine for humanity to work on aging, but I don't think it's a societal imperative.

Death and aging sucks; and that is fine. It is part of being alive. The utter fear of death many of us harbour inside is a strong force that manifests itself in many beautiful forms.

I am terribly afraid of death, yet I would not choose to upload my consciousness to a machine. I would not put myself in suspended animation. I would not like to live 300 years either. There is deep comfort in knowing that my days on this planet are limited and life is short. Better get a move on.