If my response interests you, I suggest that you read up on Derrida's later ethical thought. This is a decent introduction: https://iep.utm.edu/derrida/

My response to your question is that I don't think we can 'justify' either using birth control or not using birth control; I think we simply do it. To decide securely in favour of either choice entails an appeal to metaphysics - usually, an idea about the value of life, which collapses under closer scrutiny.

In the decision to have or not have a child, either choice requires us to consider our responsibility to the others who will be affected; we fail to meet some of our responsibilities to others in either choice that we make.

I think these questions, and many like them, are beyond rationalistic ethics, and are decided on the terrain of power and desire.

writer for realtime CEO, the startup and noteworthy. politics, philosophy, economics.