As a kid I caught busses every day on 3rd Ave without a problem, and yes, the same open drug dealing still happens at 3rd & Pine (by the crackDonalds), but that has been going on since before I moved here in 2003. When I transfer there now, not much has changed in terms of the people you'll see.
The level of danger hasn't changed, but the homelessness crisis has worsened and become much more visible as we fenced off the underside of bridges, replaced parking in the inner suburbs with bike lanes (in large part to push the van dwellers out) and rent has increased. We have an opioid crisis that is going untreated, high rents and few middle income jobs.
Our society is stratifying badly between the 90% that is getting poorer every year (and feels no hope) and the 10% that are able to afford rent in prime cities.