Your premise that 'we never count' really doesn't matter. Why? It is your choice to ignore a, reality, but that does not make that reality disappear from existence.
Reality - women have 500,000 abortions a year. They all disappear into medical waste containers and we are better off for it.
And?
Legally binding is legally binding.
We can't lock up the murderers, we are really going to lock up some poor kid who tracks down his sperm donor on a DNA registry?