First of all, I'm thrilled someone looked at the footnotes - thanks :)
I was flippant about the arguments against longevity only because other authors (linked in the appendix) have done such a thorough job of making the case already. The goal of this piece was to help push the longevity discussion past that a bit.
Completely agree that the arguments against longevity should be taken seriously. I just happen to think they're wrong.