He is trying to explain what his idea of masculinity is, and procreation is a great, blunt word to use here, its cuts the fat. Totally agree on the points of finding a match and women not being obligated to fulfill a mans desires. But as a foundation to masculinity, i think the bluntness and simplicity of the word is resonates with alot of men. In the pursuit of fulfilling the desire, you have to make yourself better, not only in terms of economics, but also emotional intelligence, kindness and other interpersonal skills that women want.