So, this common trope is thrown out when men express the desire not to be responsible for a child they didn't want and the woman (and her alone) decided to keep the child.

Imagine you are dating someone, you are getting pretty close and have even discussed marriage.

During one of the discussions you both decide that you want to own a house so you start looking online, contact a real estate agent, set up some appointments and look at some houses.

A few months go by and your partner comes to you one day and says "We bought a house", your response is, What???, I didn't agree to this.

They respond to this by saying "One of the consequences of looking at houses is buying a house and now you owe me half of the mortgage payments for the next 25 years"

In a lot of ways, this is exactly what happens with unwanted pregnancies from the man's perspective.