It also gets used way too often in cases where it's a 17yo running off with their boyfriend or a custodial dispute where the child isn't in any danger but is a day late coming back from the weekend with the other parent.
You can’t turn off Canadian ones. I went to a music fest just over the border of Canada last year, and my phone would randomly go off every few hours because my phone would pick an American tower then swap back to a Canadian tower and sense me as “new to the area” or whatever. I can turn off American amber alerts.
Plus not everyone here is American. I'm so thankful that here in Germany these notifications only get used for catastrophic events (which is never) or the yeary test that got postponed 3 times in a row, lol.