Taken from the CompTIA IT Fundamentals Exam Guide book (2nd edition, published 2021). I'm not sure if they fixed this in newer versions, if at all.
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Because what you mentioned is ahistorical and based off reactionary history by bad actors.
Rms draws the line a GNU because GNU stands for a free operating system, which is what the GNU project is aiming towards. If this were purely a discussion about technicality, then we would be wise to let the matter drop, but that's not whats at stake here.
You can, you literally can and it would be better that way to accurately describe what operating system you're running. The shortest possible name is GNU, but that would be unfair to the contribution made by the linux foundation and the fact that multiple kernel projects do exist: so the name is GNU/Linux.
His essays on the topic which are publicaly accessible from the GNU website do discuss this.
Rest assured that rms does not doing this out of ego tripping. Maybe you should tease Linus Torvalds for calling his kernel linux and the ENTIRE operating system linux. Torvalds is a multimillionaire who has used an apple M1 laptop. Stallman has never budged on libre software and directs his own life by his own stated principles. Call Rms stubborn, but never call him egotistical.
Please read Free Software, Free Society by Richard M Stallman so that this doesn't have to keep springing up anymore. There are very few "linux" comm members who have read the foundational literature in full so I hope you do take my advice.
Here's a link to the book:
Free Software, Free Society, Third Edition - Richard M. Stallman, 2015 (PDF)
I was preparing to search for it and your comment ! Thanks lol