We have FM enabled for our family too, I move around for work a lot so people can check where I am before calling me. My kid visits their friends and we can check where they are to see how long it'll take them to come back for dinner when we ping for example.

I've got location shared with my siblings and parents too, both ways. And my SO has a similar thing with their siblings and parents.

It's all about trust, people don't stalk or continuously check where others are. We mostly use it to see whether to bother someone with a longer FaceTime call or if they're coming over we use it to check their ETA.