sure, it does not matter that things that we pay for and consume ends up having a million things that makes us sick in multiple ways, and if you are in some developing nation, you would be hard pressed to find food to feed your babies that is not laced with some kind of harmful pesticides or fertilizer, but hey, we can always pay more in healthcare to extend our diseased misery. We are doing just fine, in the mean while, there are more and more existential threats as the day progress, but hey, say it with me, we are JUST.DOING.FINE.
Most countries (including those outside the west) are falling, or have fallen below replacement rate.
If we extrapolate this over the next few decades, and accept the conclusion that more technology = less children, and we can expect to see more technology in the future. Almost no new children will be born from within these high-tech societies, we will have to rely on immigration from Africa (the only place where replacement rate is high), and low-tech traditional religious societies.
People still have children and most countries do not need to be any more crowded than they are already. In fact many countries would benefit from having a lower population density.
Technology has already replaced most agricultural workers in most developed countries and I can't imagine anyone wanting to return to pre-industrial agriculture.
Enough food, clean water and knowledge of germ theory does most of the work there. New England has higher rates of natural increase for most of two centuries without benefit of modern medicine, as did Quebec.
Evolution only makes predictions about reality, it doesn't tell you what is more moral or what you should do