You say it's not pragmatic yet history seems to disagree with you.
Humans create resources we don't just find them. 300 years from now we are either harvesting the universe or we are just sitting ducks waiting for some giant cataclysmic event. At least my "ideology" gives us a chance where as yours just wait for us to join natures 99.9% extinction rate.
Ok, I will stay in my pragmatically driven (being in favor of endless population growth is just another ideology, being in favor of neither is pragmatism), non population exploding enclave and become rich in the process. I'll be looking forward to seeing Africa mass produce poor people.
Your ideology requires technological progress to always be faster than human population growth, sure you can keep this up another 300 years but at some point you are going to trip.