I grew up in europe, and I had two instances where I came close to being abducted as a kid.
You are naive if you think parents are overreacting. once you become the statistic the statistic is meaningless to you
Predators don't just snatch you up like in some movie, they watch their targets first, or lure them away.
People/children have a gut feeling when something is not right and can call for help.
Will it be 100% effective, no, but it will drastically improve response times just by knowing the exact/last location.
But these are personal preferences, I’m not imposing this on anybody.
As a parent you can still make the decision to not pick your child up if they are tired and want to be picked up.