Pesach happened because of this question!
Amram asked this question, he said “Why should I have children if they will be thrown into the Nile?” And Miriam told him “Pharaoh is killing the boys, you are going to kill the girls too?” Amram listened to her and Moshe Rabbeinu came out of that.
Thegra:
I have a source: Adam and Chava had children before he started earning a living.
And in the Midbar, our antecedents lived and had children for 40 years.
Our job is to live and have children. Hashem gives us the parnasa.