Thanks for sharing! Ironically that's kinda similar to what I believe, with the biggest differences being I think your legacy/existence is continued by your people (ie those genetically similar to you, particularly family) vs someone of similar mentality, and that I don't think the purpose of life is to just go with the flow, but instead we are called to fight bitterly for a better future. Whether this calling is a material manifestation of instinct or something that partially transcends the material world isn't something I think we can totally know either. There certainly isn't a lot of evidence for non-material influence over reality, but given we live in the material world we can't really say with any certainty there isn't either.