@jwcph So the only answer I can provide for "why" is "every waking moment of the history of this country, and the socio-political-economic order we still live under."
Every single day, millions of Americans choose to prioritize their perceived benefits, over the lives of others.
And perversely because that is the case, asking "why they didn't behave differently than everything they've ever been taught" is in some ways, not a relevant question.