I think they are incompetent and seemingly ignorant as well (which appears to be the thrust of this article), but "They don't know how to use this obscure thing

I think they are incompetent and seemingly ignorant as well (which appears to be the thrust of this article), but "They don't know how to use this obscure thing that the overwhelming majority of users will never do so they removed the capability" isn't arguing for either incompetence or ignorance, really. It's just saying you aren't the target audience, which is true.