I'm not alone in such an opinion, see, e.g., https://tiagoverissimokrypton.medium.com/medium-why-no-mathjax-6006d7f5cbad

Also, support of the features I've mentioned would be useful not only for articles about mathematics and physics. LaTeX/PGF/TiKZ only started as tools for STEM-connected works, but gradually developed into full stack of open-sourced publishing. I, for one, tend to write all my documents in TeXnic Center, only opening god-awful Word to convert .tex into .docx when my editor/peer is for some reason shackled by Office-related workflow.