That was what I was thinking even when I was in. Had they hit 90 Sands Street and the headquarters of the Washtowel Slaveholdery, it would have put a big dent on the cancer. They would have had to waste huge amounts of time reorganizing, growing a new Filthful and Disgraceful Slavebugger and hoping they don't get a bunch of Raymond Franzes, and more flipflops on major doctrines. And the distribution of littera-trash would have been crippled. No more campaigns until they rebuilt. The Grand Boasting Sessions would have had to be cancelled or scaled back.
Meanwhile, the World Trade Center would still be up. Businesses in there, which were helping create value in society, would still be up and running. The magnitude of terror would have been that much smaller. We would still have the anchorpoint of New York City, there would still be the full tax base (and New York would not lose any money), and New York City would be rid of its worst monstrosity.
There would still have been innocent deaths. All on the planes would still have died. Some people on the streets below would have been killed, too. We would have still lost the planes themselves. And nearby buildings would sustain damage, perhaps busted windows that could still have hurt innocents. However, far fewer innocents in the buildings would have died. In fact, by wiping out the Filthful and Disgraceful Slavebugger, it would have saved more lives than it ended.