You are welcome.
I could have used better language than "profile." Sorry about that. This article explains what I meant in much better detail.
Set up your Mac to be secure - Apple Support
"Administrators can create, manage, and delete other users; install and remove software; and change settings. For these reasons, an administrator should create a standard user account to use when administrator privileges are not needed. If the security of a standard user is compromised, the potential harm is far more limited than if the user has administrator privileges. If multiple people use your Mac, limit the number of users with administrator privileges. See Set up users, guests, and groups."
The part about your 'Apple ID' picture makes sense. I think a helpful distinction will be that the 'Apple ID' picture is only visible to you and other Family Sharing members, if you use that. The other app pictures are for you to set public images that people you communicate with will see. Finally, the login user picture is for you to know you aren't entering your Mac login password into a fake login screen and to easily see what user is logged in.
Change your Apple ID photo on iCloud.com - Apple Support
Hopefully I did not make that more confusing.
