Ah yes, let's take the most uncharitable explanation and assume that's the case.
Maybe they have no artistic ability of their own? Maybe they just aren't good at finding the kinds of images (that can be freely used without infringing on anyone's copyright) that they need?
If it were me, and the guidance was "never use AI generated images in your blog post", I would probably just not use any images at all. Which I guess for some people would probably be best. But personally I prefer walls of text to be broken up by... something.