So on the one hand you're objecting to "extrapolation" and on the other you're claiming that hypothesizing feedback mechanisms we don't know how to model, that

So on the one hand you're objecting to "extrapolation" and on the other you're claiming that hypothesizing feedback mechanisms we don't know how to model, that have not been observed in humans, and so far as I know don't even exist should be fair game? Look at Japan[1] -- roughly two thirds of their population is over than child bearing age, so even if the remaining third starting having babies at the replacement rate, their population will continue to diminish for decades. But of course their fertility rate in nowhere near replacement[2] and even the UN doesn't expect it to be that high in the foreseeable future. [1] https://www.populationpyramid.net/japan/2023/ https://www.populationpyramid.net/japan/2023/ [2] https://www.macrotrends.net/countries/JPN/japan/fertility-rate https://www.macrotrends.net/countries/JPN/japan/fertility-ra...