At which point it becomes a social issue. Because if there's enough mothers with dire Financial instability, the government will step in to help, as it should. And if the options are all taxpayers paying for your stupid decision or you paying for your own stupid decision. Your shit out of luck champ. I'm just saying society as a whole disagrees with you, so either find a society/country/government that aligns with your no child support stance, or don't do the one thing that could get you on the hook for child support.
21st century has already taken their position on the issue.
Prochoice doesn't matter if the child is already here, and the choice is not the males to make, in any capacity. The mother does 99% of the heavy lifting until the child stops breastfeeding. And so the choice becomes hers, with her input mattering 99% more. Don't like it, then don't get her pregnant. You fucked up? Well, deal with it. Because if over 90% of Americans didn't already agree with the current system, it would have been changed or changing.
See the pro abortion vs no abortion people? Fighting for decades because a substantial amount of supporters on both sides. See anybody advocating for cannibalism ? No! Because 99% of Americans do not, will not, and will never support that.