> and in America, the odds of bystanders coming to your rescue are... Not zero, but not great

Yes, because there's been a recent push to more heavily punish good Samaritans than perpetrators. When good men get metaphorically crucified for helping, they stop helping.

If that seems like a common sense outcome of such policies, you're right. But as we've seen time and again, common sense is not a flower that grows in everyone's garden.