So your assumption is everyone going to Moon or Mars is a saint. And if so - who set the standard? Pope? President? And then what do we do if they become not-so-saint? Drag them back to Earth?

The whole idea that some sort of better type humans will travel to another planet is frankly ridiculous. We don't learn from our own mistakes - see WW1, WW2, current state of affairs. If anything, we would most likely destroy Mars and Moon much faster than how we wronged Planet Earth.