For me, the use case is at work. Folk have my work mobile - I have no desire to give out my personal one (as soon as one person has it, everyone has it - and then I’m getting more out of hours calls than I do already).
Actually, rooting around in the archives, this is the type of problem it solves for me:
Edit: I should say that for me I really don’t mind others that I’d use this feature with having my name / account info. It’s not a privacy thing for me.