The danger is that predators could track a child to a secluded area and abduct them.
Most abuse, abductions, and harm to kids comes from those close to them who already have access to them, not some rando somewhere.
Putting everyone into ‘oh my god, some rando is going to kidnap and kill your kid’ just amps up the already insane anxiety overload everyone is in.
The predators aren’t hiding in the bushes, they are already in the house.
Just because something happens at a lower frequency than something else doesn't mean we shouldn't protect against it or that it is not a danger to a particular person.
The fact that most abductions happen by family members has nothing to do with OPs point.
And if someone wants your particular kid for some reason, then they'll probably get them without Apple's assistance.