That's a different situation from this one, so, sure, if that's something that happened and then you're complaining about the place you don't live anymore, sure, that's also a statement that could be made.
> Between "white flight" and "colonizer/gentrifier", you're damned if you do and damned if you don't
Not surprisingly, those aren't the only two options.
> Real, actual victims of violent crime don't think it's cute or have this nostalgia for squalor
I think you're confused if you think the GP's comment "It taught me compassion and empathy and how to avoid getting knifed by a junkie in the alleyway" was nostalgic for the getting knifed part.