Why does the ship in the cold equations only has enough fuel for the pilot and cargo?

The ship aka the star dust has only got enoughe fuel for the pilot and cargo but (i think her name is merilyn) merilyn is a stow- away so she gets shot into space. it only brings fuel for the ship cuz its not aloud to have anymore

just add on too that

explanation:

each year on march 8, international women’s day is celebrated around the globe. it’s an important opportunity to shine a spotlight on women’s involvement, contributions, and accomplishments on a range of issues from domestic violence to the role of women in the c-suite. the theme this year is “be bold for change”― a dictum that those who know me personally will acknowledge has pretty much been my mantra throughout my career on wall street, in media and most recently, in philanthropy.the empowerment of girls as leaders, who can be emboldened today to become even stronger leaders tomorrow, is an increasingly recognized imperative in our world, and it couldn’t be closer to my heart