Except they clearly did consider it? And made many countermeasures, from beeping loudly after separation, to releasing an open source first party app on the dominant competing platform to show what is going on.

If anyone provides a device? It’s also traceable to the owner/person watching it.

None of these things are possible/done for the myriad of GPS trackers out there. Apple has made it very risky and frankly dumb to use them for this purpose.