Ask HN: Do you think phone numbers should be private to other employees?

I'm astonished to know that phone numbers of anyone is visible to others within an Active Directory, and it is more than hard to change this behaviour:

https://serverfault.com/questions/642002/is-it-possible-to-hide-a-phone-number-in-the-global-address-list-from-certain-us

Personally I believe that phone numbers should be a kind of privacy not only for public but also for internal systems, since you do not trust all of them (especially in a large corporate). But given this, I'm wondering if this behaviour persists in other places (e.g., G Suite), and does it "seem just normal" to people?