I wouldn't recommend org-mode for writing professional documents. It is more unstable than any other major piece of software I've used. I use it daily, but not for writing. Things get changed in each release, the documentation is rarely in sync, and in a lot of cases major changes are not documented at all.
I learned the hard way. I wrote some presentations using org-mode. Then they changed the exporters without updating the documentation. It would be especially problematic to write an academic article in org-mode, because you might have to return a year or two later, and that's not when you want to find out how much has changed since you last worked on the paper.
One can keep the intermediary .tex files should they export to pdf. Or for any substantial project one can fix the version of org, as other projects do so with the versions of the compiler or of the libraries. Still, if you are correct, then it is a problem for every user. I haven't encountered such problem in my use, although my use of ox-latex has been rather superficial (some homeworks, a tiny CV).
It's true that org-mode is a bit of moving target, but the basic syntax for document formatting doesn't change. If you are really worried about this you could record/archive which version of org you used to put your paper together.
I learned the hard way. I wrote some presentations using org-mode. Then they changed the exporters without updating the documentation. It would be especially problematic to write an academic article in org-mode, because you might have to return a year or two later, and that's not when you want to find out how much has changed since you last worked on the paper.