True, the eiffel tower doesn't do anything, but that is still better than the great library which I think is harmful. Now, think about when you find huts early in the game. If you pop them what's the worst thing that can happen? It is to get a junker tech such as warrior code, right?
Now, let's assume that you have been lucky and avoided all the junkies. Why then make sure that you get all these junkers by building the great library? If you desperately need them, you can trade for them with the ai instead.