The US I guess.
The US I guess.
I do think you need to be aware of the environment generally and, while there is always some risk (anywhere), you can alleviate a lot of it.
I'm very familiar with a large northeast metropolitan complex and there are places/times I wouldn't go but lots of places/times I would.
ADDED: Probably unfair. Some are willing to tradeoff safety for culture etc. so long as they can essentially buy their way out of some of the potentially uncomfortable urban aspects (which is presumably what's being discussed here). This is a perfectly understandable attitude--as it probably was in NYC in the 80s or so.
Then of course there's differences in opinion on actual risk. I don't generally feel comfortable around variables i don't understand. I grew up around addicts and found them to be very unpredictable, and so my reaction may be biased. Nonetheless it's true for me personally.
edit: Conversely though, i think humans have a tendency to get used to nearly anything. We then can downplay the risks of things we've become accustomed to. Even if the risk of violence is low, risk of general unpleasant interactions would be enough to make me avoid the bus/etc.
I was in Detroit for an event a couple years ago. A number of us didn't really feel safe after dark and there were a couple incidents that other attendees experienced. Part of it was the general reputation but we also just didn't really know.
Whereas I'll walk down 5th avenue in Manhattan at two in the morning with no real concerns though I'm being more alert than if it were noon.
As you say, it also wouldn't take many bus/subway incidents to make me go: "That's a nope from now on."
Also, because you may have family and ties to the area.
Relatively recently (maybe 5 years ago), a work colleague got an AirBnB "bargain" on a house in the Roxbury area of Boston for a group of people for a conference and told me there was a shooting down the street. I was, like, IDIOT, you might have asked a local why it might have been such a bargain. (To be clear I'm not sure how objectively dangerous it was but I wouldn't have been staying there and walking at night.)
Not sure most of Manhattan was unsafe generally but you were certainly careful. Not sure that accidentally taking the express subway up to 125th street was actually a guarantee to walking out to a hail of bullets but you were definitely careful to a degree you probably aren't today. I never a foot in Brooklyn until much later. And I remember a somewhat scary drive from LaGuardia to the Port Authority late at night along 42nd Street because of some confusion around schedules.