I’ve been hearing similar problems in many big cities as well (Portland, SF, LA, Austin, …) but you might be more immune to the trend if you live in a suburb instead (eg Bellevue or Kirkland rather than Seattle, but thefts are beginning to intrude even there).
Personally, I live in the valley (SFV of LA) and haven't had issues, but I live in a low-middle class area full of russian/persian immigrants. I wonder if wealthier areas are targeted?
Maybe, but it's also probably still extremely rare and internet discussions oversample people who have been victims. I've only known one person here in LA who's had any of their packages stolen in the past few years, and that one turned out to be due to a bizarre personal vendetta.