@feditips
It was probably a fast & simple way to make things presentable.
But certainly it would be possible to cap the width & cap the height, and make the thumbnail fit therein w/original aspect ratio. It would theoretically be even more readible if they did a LaTeX wrapfig of sorts, so the text wraps around the image. But I guess that’s tricky in HTML.
The biggest annoyance is the preview truncation which forces me to expand every image.