A person should be an open book, at least in my world. I may not be interested in reading every chapter, but I'd like to know that the information is not hidden, should I want it.

Of course, some of the questions that you have listed could be readily available online but that is a whole other issue and can of worms.

One's online identity can be fictional. I've noticed some people I meet have convinced themselves of a version of their lives which is not independently verifiable. We prefer to create a story in which we are the hero or at least our failings are someone else's fault (my parents were mean, my business partner cheated me, my mother's second husband stole my inheritance, etc.).

You can be a perfectly acceptable parent or spouse, but after you die some carefully hidden secrets come out and cause havoc in the surviving family. Two recent stories: A friend of mine married into what he thought was a wonderful and close family all living on a large family compound. He embraced his new family. Then the father-in-law died and everyone discovered that the father-in-law had run up huge debts and had mortgaged the farm where the extended family were living. Creditors were coming out of the woodwork, and my friend, who had other goals and plans suddenly had to save his wife, kids, her mother, her uncle, and her grandmother from eviction.

Another friend's father died when he was around 28 and he then discovered that his father had a whole family, siblings, an ex-wife, kids in the US.