> Plus, who cares if my good friend knows where I am at any time?
I would guess that my father would have also said "who cares" if his best friend knew where he was at all times. Until he found out that his "best friend" did detailed reports on him to the stasi for Years. You never know with these kind of things.
Giving up your privacy for the tiny convenience of not needing to spend 5 seconds to write a message after you arrived home sounds insane to me.
> If I didn't want them to, I'd just disable the location.
Why is that the logic you apply here? It could easily be applied the other way around: If I want them to know, then I can enable it temporarily.
Doesn't that make much more sense than the opposite?