"We have no way of knowing you can stop it. Even if we return to Earth and you go down there, that doesn't stop them from demanding more, and I would still be defying their orders." Kirk stood up, pacing a little. "This crew matters more then me being captain, in the end. I've got a duty to everyone, including the people that are from other universes. I promised them a safe haven, all of you..." His eyes closed.

He wouldn't let anyone become some Starfleet science experiment.