I would venture to say that the history of the USA is full of violent events that make no sense. And when I say "make no sense," I don't use the term to suggest something unexplainable or something that would be considered a conspiracy theory at best. I use the term in the sense of "It makes...
I got my SUBE at the Tourist Assistance Center in Recoleta years ago. At that time, just needed to show my passport
https://turismo.buenosaires.gob.ar/en/article/getting-around#:~:text=SUBE%20cards%20are%20available%20at,some%20kioskos%20with%20automated%20terminals.