Child alert systems find about 50 or 60 kids a year (US). Turning them off is a pretty shit move for the ~dozen per year that come through.
> if you miss one for any of the many reasons that could occur in an emergency(
"It's not perfect so why bother?" Is an odd attitude. Per the above, I keep on emergency weather alerts even though I might miss some.
>I wouldn't know where to go to seek out those alerts.*
You can fix that. I know where to go for such things during adverse weather events, and when an AMBER alert has been issue for a kid I'm often curious enough to see if it's been called off a few hours later.