When it comes to bitcoin wallets is totally a kind of private pants for females and boxers for male.
Do women actually share their pants? What's the possibility that it happens?
When something is private because of hygiene is different when it is private because of security and trust.
If you are married, you can share everything including wallet keys with your loved one so that your coins will not lost when you eventually die.
While some people will decide to be private and remain private even till death.