We don't know what was happening in those cases. For example, we don't know those passers-by did or didn't actually see. Let's not make the same mistake all over again of projecting our pre-existing narrative onto a paucity of facts. (I don't mean to pick on you personally. We all do this, of course.)

Edit: There's a long history of belief about bystander apathy which hasn't held up under scrutiny. Related:

Surveillance cameras debunk the bystander effect - https://news.ycombinator.com/item?id=20417986 - July 2019 (161 comments)

Killer of Kitty Genovese Dies in Prison (Origin of “Bystander Effect”) - https://news.ycombinator.com/item?id=11430051 - April 2016 (3 comments)