Yeah, whatever he wants to claim about her ignorance of their historic situation (not that it even makes any sense, Earth can't "run out of resources" as long as the sun is going, and they could always get more from space too), he himself is a product of the same situation. He's seeing things here in this flashback as an elite looking through remote viewing and windows from on-high, making assumption about how all "the commoners" lived and what they would want. It's easy to assume people are worse then they are, even if it was the end I bet he could have gone out there and walked around and found people who'd invite him in to share the last of their food and be happy to live out their final time in peace and grace. Yakone's journey has given her just as much perspective. And she's also seen that there could well have been a third way, he felt so self-righteous and arrogant he just went instantly to the opposite extreme. Even if it was necessary to open the gate to some extent, with better containment and isolation and planning, perhaps doing it out in the wilderness, perhaps letting most minify first, there could have been coexistence and not throwing away everything good they had even as the wilderness got new energy. With more R&D on the new possibilities perhaps most if not everyone who wished to could have made the transition.
In short: beat the shit out of him Yakone!