Comparing acid attacks in London to San Francisco's problems is like comparing plane crashes to car crashes. The former is worse per occurrence and gets more attention, but the latter is much, much more common and so worse overall.
My point is that just because I heard an acid attack outside my hotel in London, it does not make me qualified to criticize London or those who choose to live there.
Just as someone who visited SF a few times and saw some feces (etc) is not qualified to criticize SF or those who choose to live here.
I’ve spent six years in the Bay (SF and Berkeley), and the unfortunate truth is that the feces, homelessness, and public drug use have become prominent features of today’s SF.
Nobody will tell you that London has an acid attack problem. I've lived here for years and heard about it maybe once on the news. Everyone will tell you SF has an issue with homelessness/mental health, and they've seen it with their own eyes.
Yes it does. People are allowed to have opinions and express them. I've never been to SF, but I can just tell from what I've seen on sites like this that I would hate it. You can feel otherwise and that's fine, but other people will judge SF for their inaction on issues like ubiquitous homelessness.