Good points. I still felt safer back then, but as you say we had no instant news.
You're not alone in that feeling. Studies have shown that people in developed countries worldwide feel crime is rising when in fact it's not.
Increased coverage (and increasingly sensationalised coverage?) is definitely one cause of the misconception alongside perhaps a nostalgic view of our childhoods. Added to that, in the UK you've got politicians comparing gun violence in Manchester to Baltimore.