I’m pretty sure it’s actually those shoulder pads.

I think it’s the symbol for a hot springs from Japanese maps.

Wouldn’t the vision of immortality make the problem even more immediate for them?

“Oh, Holden Bloodfeast XIII, born 2259 might die at 16 from cancer from the envitonmental catastrophe I’m sowing… Meh.” rings different from “my own lust for immortality will be turned into scavenging a wasteland I wrought?”