Except that it is a known fact that some convicted criminals were actually not guilty of any crime and later exonerated. Honestly I probably shouldn't have made those comparisons because people like to focus on the misalignment of comparisons and ignore the overall point which in this case is that we don't all agree life is an absolute right and we can't even agree when life begins anyways.
Your question assumes the unborn child has the capacity to have an opinion either way which clearly fetuses don't.