Ah, so Apple is linking the feature of finding _my_ phone with reporting on lots of others? That explains why people turn it on, but I find that creepy.
It's really useful for locating lost headphones, laptops, etc. -- whether stolen, left on public transport/taxi, or left at a friend's house.
Edit: link to Apple's description of how Find My works: https://support.apple.com/en-gb/guide/security/sec6cbc80fd0/...
Would have been nice if the article explained a bit what is actually happening. The wikipedia article doesn't mention it either...
That's right - you can read more at [1]
1: https://support.apple.com/en-gb/guide/security/sec6cbc80fd0/...