It is quite clear by Ridley Scott’s commentary on Prometheus that the Black Ooze is like Pandora’s Box, nothing good can come out of it. Even if intentions are good when using it.
“If you look at it as an ‘our children are misbehaving down there’ scenario, there are moments where it looks like we’ve gone out of control, running around with armor and skirts, which ofcoursewould be the Roman Empire. And they were given a long run. A thousand years before their disintegration actually started to happen. And you can say, ‘Let’s send down one more of our emissaries to see if he can stop it.’ Guess what? They crucified him.“ – Ridley Scott