@ucbalumnus hit the nail on the head. Thanks to the usage of leaded gasoline until the ‘70’s, violent crime rates were much higher in the ‘70’s and ‘80’s in to the ‘90’s than now (and urban areas were affected harder because a lot more cars drive through there) while some folks have their impressions formed in those days. I visited Hyde Park very often at all times in the ‘00’s and it didn’t seem unsafe, but someone I knew who attended the U of Chicago back in the ‘80’s said (stranger) rape (by people not affiliated with the uni) happened at that school roughly once a week back then.
My wife and I use to walk through Greenwich Village a ton in the ‘00’s (including often at night) and it didn’t seem unsafe at all, but someone I know who attended NYU back in the ‘90’s said it was still pretty rough back then. Crime in the NYPD 6th precinct decreased 80% between 1990 and 2018. BTW, the Village is predominantly white.
Downtown Manhattan never felt unsafe to me when I worked there (including late at night), but one time, when I asked a former boss what it was like to commute in to downtown back in the ‘80’s, his response was “I feared for my life every single day”.