Would you argue that if a man decides he doesn't want to pay for a child he helped conceive he shouldn't be forced to?
As long as the woman makes the decision whether to have the child, which she should, the man should not have to pay child support if she chooses not to, unless he entered into a marriage contract with her first. Anything else puts all the responsibility on the man, all of the rights are the woman's, which is just a form of slavery. You're not a deadbeat unless you make promises and then don't keep them. I say this as someone who had a deadbeat dad who cheated on his wife, got divorced, then drank up the child support money. He made a commitment and then failed to follow it. There is reasonable justification for treating him like a criminal; he broke a contract.
Only in the case of perpetrating a rape should the man have to pay child support out of wedlock, and a woman should have the absolute right to decide whether or not she has a child. Anything else is grossly unfair and puts all the responsibility on the man.
ObDisclaimer: I have no children, wanted or un-