"Rescue" conveys a much more negative situation than "unplanned itinerary change where the astronauts are safe and which they are happy about because they get to spend more time in space".
I bet if you asked each of them if they could extend such a unique experience - one they're unlikely to experience again - would they say yes? IN. A. FCKING. HEARTBEAT.
The postive's overwhelm the negatives by an infinite amount.
