Mind you, I'm not necessarily with the GP. It seems like a question of only marginal relevance. But the parent reads like a low-effort dismissal that doesn't actually address the point.
As someone who grew up in the suburbs, and has since lived in a rough part of the city, it also resonated with my personal experience.
In the suburbs, nobody generally knows each other. In the city, due to density, you just have more neighborhood interactions.
Sometimes inner city interactions are uncomfortable or with crazy people, but they're generally non-violent.
If I had to peg percentages, I'd say:
Inner city: 30% awesome/interesting/helpful strangers, 55% ambivalent strangers, 10% unpleasant strangers, 4.5% crazy strangers, 0.5% potentially violent strangers
Suburbs: 15% awesome/interesting strangers, 70% ambivalent strangers, 15% unpleasant strangers, 0% crazy/potentially violent strangers