It's a legitimate question! Many people wish they had never been born. What right do you have to force such a person into existence without their consent?

In the absence of someone's ability to give consent - ie. Informed consent in medical terms- the responsibility is assumed by the parents or guardian.

Since an infant or fetus is unable to provide consent, why would you think a parent is incapable of doing so?

This is a baffling line of thought to me.