When I hear this I just go
"Okay, well let's do something about it. Let's provide full well-funded education to everyone including all women. Provide good comprehensive sex ed., provide free no-questions asked birth control, allow abortions, advanced elder care options, and have Women have full access to all careers."
Other person: "umm, durrr, muh taxes"
Because that is what would actually help lower population in a humane and not-fucked up way.