[uksys144]

One person can keep a secret, but not two.

In my opinion, the idea of limiting access for a group of friends looks controversial. Your friends, relatives have not signed up to not redistribute the content to other folks/friends. Taking that into consideration, it is reasonable to edit out all private content and then make the posts public.

The other rationale for public posting is that hidden, close circle posts do not bring you more friends or co-thinkers. Hidden posting is not about being social, IMO.

However, in case of closed, invite-only community with some kind of regulation enforced or in case of company staff bounded with NDA, your approach sounds reasonable. Maybe your project should target corporate segment. All that crypto ciher gears, preventing data leaks, would be much more relevant there.