Why are all these longevity bros such total snowflakes?

I am not sure how you judge a person to be a snowflake or not, but Peter H. Diamandis (cofounder of Human Longevity, Inc. and podcast host) could be considered a "longevity bro" however I wouldn't consider him to be a snowflake.

I think HN is full of them..

I remember one dude posting something like "Why the heck haven't we conquered death already!? There should be no shortage of funding!!!"?

Maybe all nonsense terminology is equal? Highly plausible.