I don't think the objection is so much about filling the space as it is about filling the space with something I won't be able to get around to watching for a while, potentially obstructing the recording of something she wants to watch.
"Bob, you can't drive this like you do your average starship. You have to ramp up the reaction and
then gently engage the nacelles or you'll overload the injectors and have to reinitialize!"
"So...goose the throttle and then ease off the clutch or I'll kill it?""Pretty much. Yeah..."