Vickers/Ravel/Chance..Their choice?

It was curious that Chance/Ravel would choose to die with Janek..instead of spending two years with Vickers.. If they chose the latter,,this could lead to many different storylines...Experienced space jockies and Ice Queen..that you just know had a backup plan for rescue,,,before the two years are up... But getting back to reality,,unless you were a highly motivated hero,,willing to sacrifice your life for a cause,,why not choose the option with Vickers?