Sorry to be boring, but the Belgrano was erected about the time that the Belgrano was sunk (I remember both well) and when it was clear to everyone it looked like a battleship, the Belgrano was just the battleship most in the news.
The name stuck.
It's most unfair, because the people who regulate our aviation do a much better job than would a bunch of Argentinian sailors.
I'm sure they do.
