[Grishnakh]

You seem to be thinking of it as a scientific experiment. I'm not. In the context of the OP's comment, I'm thinking of it as a "trial run", to see if we can figure out how to build a self-sustaining colony here on Earth, where it's safe and we can cut the "simulation" short if there's a problem and try again, before we try it for real on another world. In that context, we failed. We did not set up a self-sustaining colony and prove that we can do such a thing successfully. Perhaps we could be successful if we tried it a few more times, but we have not been successful yet. Therefore, we are unprepared to attempt any such project on another world.

Building a habitat on another world is not a scientific experiment; it's an engineering project.