The information provided earlier is based upon the information from Apple so is Technically Correct.
If the User has issues with Apple - best one directs that to them >>> Product Feedback - Apple
What’s new in Mail on Mac? - Apple Support (CA)
- When you first open Mail, you can choose to enable Protect Mail Activity to prevent senders from using messages to learn your IP address and about your activity in Mail. See Use Mail Privacy Protection.
As for Third Party Software - Any Third Party Applications that will interfere with the normal operation of the OS, is an invitation for disaster and comprising the Operating System
Whether or not the software was installed and used on this specific computer , it was not assumed to be installed but a cautionary mention. It is not surprising to see some Users Install the pervious mentioned software believing it was actually a requirement for Security Purposes
As above does not apply to this computer - some much the better
Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a portion on each sale. What the Application may do to the computer is up to the User to check this out before purchase
Hacker would Require Direct Physical Access to the computer and know the computer password in-order to gain access to the computer and do their Bad Actor Stuff.
Further - specific to Big Sur macOS 11 and Monterey macOS 12, the Operating System resides in a Sealed and Read Only Volume that can not be opened by the User and protects against from “ Bad Actor “ Software.
Lastly - these Apple Support Communities are Hosted by Apple and frequented by fellow Apple Users who volunteer their time to assist other Apple User and specifically on Apple Services, Equipment and usages of them.
Anything outside of those perimeters is generally off limits.
Community etiquette guidelines - Apple Support
