With your “discontent about the humdrum status quo of human life and our frail, terminal human bodies”

…read your Bible.

“all have the same breath, and humans have no advantage over the animals; for all is vanity. All go to one place; all are from the dust, and all turn to dust again.” (Ecclesiastes 3:19-20)

Or if you can only hear wisdom in a modern, amplified idiom:

“Dehydrate back into mineral. A lifelong walk to the same exact spot.”

“Someday you will die somehow and something’s gonna steal your carbon.”