Read the article. This is a MacOS problem, not a Logitech problem.

The main buttons worked fine, only the specially configured extra buttons didn’t work. Those buttons require a configuration program. There’s no evidence this program needed an Internet connection.

But MacOS blocks all software that doesn’t have an approved certificate. It’s basically the same walled garden as phones. Logitech’s certificate expired.

It only affected Mac users, and only because of the walled garden.