Worldwide, Mario is more recognizable than the mouse. Nintendo is going to start their own movie studio soon. They are copying the blueprint set out by Disney.
I think their might be something wrong with your browser or something. I tried the code blocks using spaces, tabs, and backticks, and I didn’t have the img problem you had.
I also checked from a different account on a different instance on a different browser this post and I can see the link.
But even for a simple static page there are certain types of information, like alternative text for images, that must be provided by the author to provide an understandable experience for people using assistive technology (as required by the spec)
I wonder if this includes websites that use <figcaption> with alt emptied.