I have a new perspective towards what it means to keep things private. I am thinking that keeping things private does not always mean keeping things to yourself. Before you criticize, I know that to have someone as trusted as that is rare and almost impossible, but they still exist, and sometimes you can find that person in your spouse. If you can share important details like passwords of bank account or safe, or grant them access to important documents, should we not also be able to trust these people with access to our bitcoin wallet?
What you said is not entirely wrong, but the problem is when we see many divorces that occur when some of them have been married for several years and finally have to separate very sadly even though they already have children. So I can't completely agree with that even though it is very possible for some people if they can be sure that their life partner will never run away from them again until the end of their lives.
But if that is still not certain because of the estrangement of the husband and wife relationship due to something or due to differences of opinion, of course there is no need to share everything with our life partner even though he or she is the person who is always in our house at this time. And actually I would rather share this with my child when my child is old enough to know everything and I would direct him not to give it to anyone including his own mother if that is possible for him.