That makes sense. The main reason I don’t use docx for that stuff (outside of not wanting to pay for a license for mediocre software) is that I used to have a big problem with recruiters destroying all the formatting of my resume by inserting their ugly logo on the top. PDFs are harder to modify like that, and if they insisted on it in docx I could say “oh I can’t do that because it’s in LaTeX, here’s a link to the source though and make any changes you need”.
None of them ever once actually attempted to ruin the resume again.