> The birth control pill decoupling sex from pregnancy.
Boom. Done. You had the answer already and just didn't reconcile your own thoughts.
You really need to interpret the comment you're replying to in the context of here and now, not 100 years ago before people had a choice about whether to get pregnant from sex. Doing otherwise is misleading.
Within the context of people having more choice about pregnancy, the critical remaining piece is that the world is economically and societally absolute shit for people to have children in. Women don't just have the option of entering the workforce, they increasingly need to because a dual income household is now the market expectation in relation to cost of living in developed cities and especially cost of living with children in developed cities. Not to mention the capitalist class war overtly amplifying economic disparity instead of reducing it. Not to mention the environment, climate, justice, and social wellness being gradually destroyed by plutocratic christofascists on a grand scale.