Correct. There are risks to not having one, but the changes to the Digital Auth won’t impact you.
This is only for people who have been using the stand alone digital Authenticator App from Blizzard on their devices.
See the pinned post at the top of the forum. They are ending the Digital stand alone Auth app and integrating it into the Battlenet App (logins, chat, etc.).
If you don’t have an Authenticator on your Battlenet Account, or you are still using the physical keyfob one, this does not impact you!
I am happy to help with questions on this if anyone needs anything. Personally I still use my old keychain. I will have to switch some day, but that day is not today.