> For example, Nature is so kind as to accept final submissions in latex, but they'll convert it to Word. So it's completely pointless.
There is large gulf between submitting a paper (typically limited to a few journal pages) to a well-equipped organization like Springer Nature, and submitting a manuscript hundreds of even thousands of pages in length to a university dissertation office, when that document must adhere scrupulously to various formatting requirements in terms of tables, figures, pagination, citation, appendices, cross-referencing, etc. Word is fine for memos, briefs, letters, and other fairly short documents. But its capabilities for creating complex documents that must include cross-referencing, strict placement of tables, figures, and other floats, citations, referencing, etc. frankly suck. Students can't afford expensive typesetting software: TeX and friends are high quality, stable, have a large and knowledgeable user community, and most importantly, are free. You can bet that publishing houses aren't using Word and PowerPoint to produce anything beyond email. They accept Word documents because of Microsoft's market dominance, which is unrelated to the quality of software they publish.