

Privacy isn’t necessarily about risk for everyone. For some it’s more about their individual right to privacy, and to uphold that right they need to be aware of ways in which it may be breached. So this is probably not practical information for most people (I certainly don’t care) but it’s useful to share nonetheless.
It is, yes. After certain system updates these apps can sometimes be reinstalled/reactivated without the user’s knowledge. Samsung is notorious for this.