Why stop there? Why just use it as a tiebreaker? Heck, why not only display links for people who pay you?

Oh wait, you just stopped being (a) a search engine, and (b) useful.

Your interesting form of logic can also be used to condemn haircuts:

"Is it okay if I get a haircut?"

"Why stop there? Why just cut hair? Heck, why not have them cut your whole head off? Oh wait, you just stopped being alive."