If nothing happens then great rather than killing off the entire program with fatalities.
I know the flight control software is not designed for this but surely somebody must have thought of this scenario ???.
NASA is worried about the thruster issue meaning that they lose control of the vehicle as it undocks and moves away from the ISS, leading to a collision. I guess that's independent of crew being on board.
But also ... the current Starliner software doesn't support an automated (uncrewed) undock. The previous one did, but some code and/or configuration changes are required to enable this on the current vehicle. NASA has said that making the changes to enable this will take about a month (including QA).