Not true. IEEE, one of the largest professional orgs, accepts Latex. So does ACM, a huge comp sci org. I'm not familiar with others, but wouldn't be surprised if many others still accept Latex.
Latex is a giant pain to use - and i say this as someone who still uses it to write scientific articles. Services like overleaf exist but that is sometimes not an option with proprietary work.
Aerospace generally does too.
Computer vision seems to.
In fact I think most tech related journals do, iirc.
There are still missing features compared to latex, but what exists seems so much more intuitive.
That is a very broad statement. Do you have any data to back it up?
Do you suggest that it was used in the past but that has changed? If so, why?