Author claims the system setting "Privacy & Security > Apple Intelligence Report > Report Duration" with its 3 options [Off | 15 minutes | 7 days] sends that data to Apple with that frequency. This is wrong - this is a transparency report so that you as a user can see everything that is getting sent to Apple as a part of Apple Intelligence. Nothing additionally is getting sent to apple if you switch this away from "Off".

It's placed right next to a similar report for the user to see which apps generally connect to the internet and to which domains.

Basically, the main point of the article, "I discovered that macOS 15.3 had enabled a feature that was phoning home every 15 minutes with personal data" is not true.