interesting point he makes there - sustainability acts as a suppressant/depressant to the human desire to fly higher and higher with language that’s about moderation, cutting back, etc…
Sustainability is about addressing the basics of survival, but it’s only a part of the picture and not something to be exclusively obsessed with.
I think the gloom surrounding this is all our failures in not having the imagination to be able to balance the talk of sustainability with challenges for the future. What’s not to be excited and invigorated about ! There’s a Universe of possibilities and places to explore out there… we’re strong, adaptable and have imagination and we’ll get better and better if we take care of the planet that provides for us in our infancy.