So, the article that you linked only talks about how more well developed nations have a lower birthrate there for the solution is to bring up the standard of living of poorer nation. Which I can get on board with alright, everyone deserves to have a high standard of living.

It doesn't talk about the rate at which those more well developed nations are using resources. What do we do about the fact that we are using more than an earths worth of renewable resources each year, or about the degradation of soil being used for agriculture, or about the increasing need for CO2 intensive energy accross the globe?

Your article makes the case that humans should not be treated like a herd of deer using all the resources available until the herd collapse. However, it offers no explanation for why thats the case, just asserts that its true.