Is asking the question on Stack Overflow 'how to insert <script> elements from .md comments in .css files to a nuxt.js-based site' a point where I should rethink my life and code design choices? Or should I see where this insanity will lead me?

You should rethink using SO.

Having <script> elements in CSS, even if cloaked in MD comments, is such a big WTF that you should probably re-think a whole lot more.

@Fast-Nop I think that having whole documentation in the file it documents is the only way to keep it in any way alive - and in normal usage it will be stripped away during build process. But yes, this is exactly what I meant by rethinking my life and code design choices.