If we allow pictures, we certainly should enforce limits (pixel size, file size, number, images per months, minimum XP required, etc). Images in posts could certainly be helpful, both to illustrate a problem and to show solutions.

On Telegram, when communicating with my fellow humans, it's often much easier to post a screenshot with a big circle around a checkbox or button (with a helpful note "Click here"), than it is to describe in textual form on what to click.

Of course, to distinguish us from the rest of the internet, we need to find a way to block cat pictures... :-)