I think they’re mentioning safety wrt to the potential for children to pop open the AirTag and swallow the battery, especially given Apple states explicitly in their instructions to not use coin batteries that have a bitter coating to deter ingestion.Apple deliberately used a removable battery to cut down on waste, which was the right decision.
Also, safer?
the idea of a child popping open an AirTag is a little far-fetched, but not impossible given that I’d figured out “child-safe” pill bottles by the time I was 4 or 5…it’s worth thinking about, but I don’t think it’s worth a moral panic a la the Tide Pod challenge of (what feels like) an eternity ago.
edit: @orbital~debris beat me to it but I’ll leave this up