Yeah. I'm sure the conversation goes something like "These therapies will save trillions of lives, because of all the children who will be born from people who will be dead if we dont do this, and every human born afterwords from that lineage wouldnt have existed. Be one of the heroes who puts an end to death!" Total utopia pitch.

Also if they feel like they are close to radical life extension, that changes everything regarding resource scarcity, do they feel like they need the ability to control who gets to live?

Yeah. I'm sure the conversation goes something like "These therapies will save trillions of lives, because of all the children who will be born from people who will be dead if we dont do this, and every human born afterwords from that lineage wouldnt have existed. Be one of the heroes who puts an end to death!" Total utopia pitch.