Maybe if we had THE tallest tower in the U.S. (or world, or whatever) then maybe, but otherwise you really think it'd move the needle? We're typically in the
top-10 or top-15 most visited cities in the country -- do you really think that if we had a 1,000 footer that we'd leapfrog over, say, Honolulu as a tourist destination? If folks are super into supertalls, Boston having *one* such building wouldn't make it a destination.
The history, the educational institutions, the geography, the walkability, the mix of architectural styles, the culture (sports, art, music, all of it) -- that's what sets Boston apart.
Having one tall building? We may as well strive to be home to the World's Largest Ball of Yarn or the nation's largest fiberglass chilidog sculpture.