The Bachelor needs to at least look good on paper for the entire thing to work. Yes, it is shallow, but what would be the point of putting Joe-Blow-the-dumbass-shlub-who-shares-your-cubicle-at-work on this show? You put a guy like that on, and then you KNOW that the girls are fighting to be on the show for no other reason than they are famewhos.
Let us at least have the illusion that the girls are fighting over something that is worth fighting over.
Another reason why Blob didn't work - he was an overweight mortgage broker. Uh, we can meet Blobs at Anybar USA, no thank you.