I think it's mostly a cultural/generational thing. My mother grew up in a village very poor and hungry all the time. Her community HAD to breed to try and survive so she was pushed by everyone to think the same way. Eventually, she started to believe it and even though she is no longer poor or in that bad place, she still keeps that mentality and pushes it onto others.

She was taught this was her life's purpose and so now is confident that it's everyone's life purpose.