> By that reasoning, no OS is suitable for non technical users.

That was the point GP was trying to make (a bit snarkily and sarcastically) in response to the argument that Linux is not suitable for nontechnical users.

No one up to iOS v14 or so ever asked me for help on using it or really fixing it. MacOS passed the grandma test for me and generally requires less user support. But iOS under jobs was a gold standard in usability.