[stetrain]

Can you guarantee that hitting the "undock and re-enter" button right now would result in Starliner safely leaving the ISS and then clearing its orbit?

Even if that had an acceptable level of risk, that still leaves two extra crew on the ISS with no seats home in case of an emergency, and NASA's policy in recent years has been to always have emergency return capacity for every crew member onboard.

I'm not saying there isn't a path forward that involves sending Starliner back empty, there are just a lot of considerations going into that decision right now.