We spend a lot of that sun on meat and other livestock products though:
https://ourworldindata.org/yields-and-land-use-in-agricultur...
(the numbers in the second figure)
https://dge.carnegiescience.edu/DGE/Dukes/Dukes_ClimChange1....
Life is a dissipative system too. It consumes energy and generates entropy. This can’t go on forever, but I wouldn’t take that as an argument against life.
It can't go on forever indeed there's a thing called the heat death of the universe, but it is sufficiently far in the future that I don't care about it.
The shit that happens now means that my kids won't be able to have children in good conscience (I already feel sorry for them for the mess I put them in).
AFAIK the energy consumption (and thus the pollution) for the benefit of developed nations far outweighs the one that benefits the poorer ones whose population increases.
The economy is a dissipative system.
It consumes energy/creates entropy to sustain itself. In its current state it already consumes more than the earth/sun can supply. Having it grow even more means consuming ever more energy (fossil and nuclear fuel is finite, the sun light is constant), and generating ever more entropy (i.e. pollution, heat, and ecosystems destruction).
Edit: also, improvements in efficiency have historically lead to a global increase in energy consumption because of the growth they spurred, and you can't get past 100%.