NPC pilots currently have no use. Droid pilots serve only to prevent travel aborting if you leave the ship while it is in motion (e.g. boarding a docked ship or vehicle).
This information (in regards to the droids, at the very least) is available on the Rules pages.
____________"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."
Only fools and children dream of heroes.