Excellent analysis. This reminds me very much of my early days as a communications professional, specialising in small business needs.
At the time, technological limitations (anf the skillsets needed to use professional-level prepress tools) meant that generally, most clients recognised the need for professional help with layout, design, and so forth.
But the *copy* (text) of whatever was needed? Clients overwhelmingly insisted they could write and would want to provide that content -- despite it generally being terrible for the intended use.
It took me a long time to figure out that many of them considered writing merely to be a functional thing that they already spent 12 years in school doing, so they 'must' already be experts.
There was zero understanding that graduating grade 12 is not the same as knowing, practising and developing the conventions, skills and techniques specific to writing for different genres and audiences, or in this case, target markets.
馃槓