Sigh. I really shouldn't have included a quote in my comment and instead only linked to the full text.
That text is exactly an argument against infinite economic growth – and it carries out said argument by looking at energy consumption (which necessarily grows with economic activity).
Yeah I read it. Thats why I said that bit about infinite economic growth. I felt that by saying that exponential heat growth is probably sigmoid I was somehow validating the notion of infinite growth, which I think sometime in an unforeseeable future will just plateau.
That text is exactly an argument against infinite economic growth – and it carries out said argument by looking at energy consumption (which necessarily grows with economic activity).