You are referring to the 1970 MIT LtG model which was updated in 2019 and still predicts a global collapse? https://medium.com/predict/2040-the-world-will-collapse-this...

Or the depleted global fish stocks? https://www.fao.org/NEWSROOM/common/ecg/1000505/en/stocks.pd...

Or the fact that if everyone went vegetarian we could free up 80% of the farmland in the world?

Whilst resource are not fixed, like lab grown meats, supplements which can alter people's diets like histidine will reduce red meat consumption, I am aware some businesses have also kept some resources under wraps from the public so I agree they are not a fixed notion, but in ten years the US lifestyle has increased its use of resource from 4 planet earths to just over 5 planet earths.

Sure anything can be a resource, we might even be able to use plate tectonics as landfill waste disposal because everything came from this planet so is technically from the Earth, and who knows what resources could be mined from the planets core, or do we get into mining Helium13 from the moon?

there is a still a problem and that is quality of life, being kept in smaller more expensive livestock pens called homes.

What price do you put on having rolling pastures all around your home and no manmade noise around you?

With a global population set to peak in 2100, we still have 80's years of declining quality of life to put up with.