What does this have to do with a soul? The comment was about people treating life extension as a religion based on faith more than evidence.
Nothing to do with the soul, or heaven, or anything else.
Radical life extension has been demonstrated… in mice.
If you don't like my chosen examples, take any other religious statement and demonstrate it in a mouse. Have Anubis weigh their heart against a feather, pay Charon to cross the Styx, whatever.
Point isn't the specific it's compared against, it's the entire set that longevity definitely isn't in, because unlike those things it has been demonstrated (in mice).