Joking aside, I worked for a big corporation once where our project manager's emails were literally blank, with the actual message in an attached powerpoint.
OMG I had a manager do this... I asked him to email me a bug report and he sent me a PPT.
Honestly he could have written a 2-line email. He probably thought he was giving me Important Information. But as I got to know the guy I realised he was just an idiot.
I once had a client become nervous about sending me a screenshot of (slightly) sensitive data. Despite explaining the NDAs, I could only get her to send a redacted version, which was fine given none of the sensitive parts of data was relevant to what I wanted to know. She took a screenshot, pasted the screenshot in to an XLSX, and put a "Shape" over the top of the part of the screenshot that she wanted to redact. Then sent me the XLSX in an email.
If you ran a carpentry shop, you wouldn't retain employees who lacked a basic understanding of their woodworking tools and how to use them. Yet we tolerate this of "information workers" the world over. Why is that? Is it because the image got to you after all, so it doesn't really matter how inefficient the process was?
I am genuinely curious. But then again, I ask the question as a computer enthusiast using a computer to talk to other computer enthusiasts about computers.
If you sell B2C software you are going to end up with customers with a very wide range of computer skills, from professional IT person to someone who can barely find the computer 'on' button. You just have to deal with it.
As a web developer, we sometimes got bug reports submitted that way. I think some people take a screenshot and paste it into Word, and don't know how to save it as an image.