Hmm not necessarily depending on the commerce it generates, the cost it'd take to let it crumble, and the cost the city would incur trying to build a new bridge. Luckily here where things are so population dense, opening a pedestrian bridge can have a really positive impact on the local communities. And to tear such an awe inspiring (at least to me literally every time I pass it) structure would be absolutely shitty.

Wait until you hear what three new subway stations cost.