As a GM you have to take shortcuts in order to populate your game universe with characters for the PCs to interact with. You don't want to invest hours of time detailing all the stats and abilities of some random NPC who the PCs might meet once and then never see again. Yet you do need to have some stats handy in case the PCs decide that they really need to negotiate with, steal from, or fight some random character they just ran across. (Any GM will know that this is not a rare occurrence.)
You can wing it, but it's easier to have some stats written down somewhere. So a good solution is to recycle your NPC stats heavily. If the street beggar, the shoe salesman, the bus driver, the priest, and the exotic dancer all have exactly the same stats, nobody's really ever going to know. Well, except that everyone already knows since this is such a common GM trick.
Lama Su: Two hundred thousand units, with another million well on the way. Each one absolutely identical to the next.
Lama Su: You are impressed?
Obi-Wan: It's just... I've never heard a GM admit that about NPCs before.
Lama Su: It's a fine specimen you sent to serve as the master copy. Very strong, good stock.
Obi-Wan: Uh, yes. What was his name again?
Lama Su: Jango Fett.
Obi-Wan: Jango Fett, that's right. Is he still around?
Lama Su: I'm afraid—
Taun We: I can take you to him!
Obi-Wan: Great. Please, lead on.
Taun We: But first... the dinosaur cloning room!