This prevents using renderers other than MathJax to render more complicated LaTeX output, such ones that involve TikZ pictures.
If the method was changed or support for custom latex processing was removed, I'd urge to update the docs. There is no mention of additional package imports or configuration being needed to use these methods.
I will also attach the project im currently working on:https://github.com/jimkoen/sagemath-thesis-template/settings
I use a slightly modified docker image, the modifications of which you can see in the repo.