I can confirm. When trying convert simple Word sentences and tables to e.g. Markdown/HTML from a Word XML you need a PhD in XML edge cases and nested garbage.
https://github.com/microsoft/markitdown
I was amazed when I realised that Word docs were just zip files and you could poke around in the xml files embedded inside of them.
I almost implemented a working React -> Word document renderer back in 2017, but it didn't have support for creating the xml tags with : inside of them (which OOXML documents use).
[0] Open Package Convention: https://en.wikipedia.org/wiki/Open_Packaging_Conventions
[0]https://github.com/microsoft/markitdown/blob/da7bcea527ed04c... [1]https://github.com/microsoft/markitdown/blob/da7bcea527ed04c...