He had the choice whether to have sex with her and take the risk that she might get pregnant. If he didn’t want to take that risk, he could have kept it in his pants. The child didn’t have a choice.
Like I said, getting impregnated is a separate issue from deciding to abort or not. If the woman did not decide to participate in the process of getting impregnated she should have filed rape charges. The decision to carry a kid to term or not, is LEGALLY only the woman's, so it is wrong to hold a man LEGALLY liable for what is not his decision.
Now if abortion on demand for lifestyle choices was not the law, then one could start to make a case for child support. It would still be a difficult case to make because the current system is a fraud with the one making the payments having no say as to how the funds are spent.