This comes up on every one of these articles. The astronauts are in no way stranded.

There’s a common sense operating rule on the station: every person on board ISS must have a dedicated seat in a ride home that is ready to undock and leave within 30 minutes notice.

Right now, the Starliner capsule is certified and ready for that role for the two test pilots. The crew dragon and soyuz are docked to handle the rest of the station crew.

Earlier today there was an emergency shelter event on the station when some debris got unusually close. In this type of event all crew evacuate to the escape spacecraft and close hatches. So if something does hit the station, it’s less likely someone gets hurt during a depressurization.

Starliner served as an emergency shelter for this exercise, because it is certified for emergency reentry, and the five identified helium leaks are not close to preventing it from returning safely.

To get from ISS to a landing site requires no more than 5 hours of RCS operation. There is plenty of margin in the helium system to cover 5 hours.