You seem to be following an utilitarian moral theory, others may propose a consequentialist or hedonistic or religious assessments of human value. The one thing to remember about ethics is there are no absolute moral rules.
Is that an absolute? ;)
But I'm always careful with utilitarian theory - it's so easy to get wrong - if any one of your assumptions are wrong. That's why I try to make sure that the final result complies with other theories (empathy etc.).
Playing with value theories is like playing with fire.