I don't quite get it. I didn't move to the city until I was in my early 20's, so I think I still look at Buenos Aires with rose tinted glasses of someone who comes from a boring town, and I love touristy things and places. Unfortunately, this brigde (inaugurated in 2001) in particular isn't one of them.
Puerto Madero is a nice place for a stroll, you'll find office workers roaming around in their suits, runners and joggers zapping around tourists, wealthy people walking their fancy dogs... This footbridge joins the east and west side, with neither having a lot to offer other than pricey restaurants and a long stretch of cobblestones. If you venture out a few blocks to either side, you might find something more interesting (be careful at night if you walk towards the east side, Avenue Giralt is badly lit. Luckily all I ran into were trans sex workers, but you never know).
The bridge itself is weird-looking, which could make for an interesting picture, specially at sundown. I personally don't find it that beautiful, but Puerto Madero is such a nice place for a quiet stroll that it kinda makes you feel at ease when you see this white structure hanging above the water.
I wouldn't recommend someone derailing their itinerary to go see it, but it's only a few blocks from Plaza de Mayo and other lovely places of the city center, so I'd say give it a chance. read more