Quoting myself from the post I linked above: as a machine learning engineer, I can attest that the only reasons machine learning engineers are good at prompt engineering are a) years of practice and b) a tendency to be pedantic assholes. But there are other professions who are even better at being pedantic assholes such as writers and lawyers, so there’s no need for someone with a specialized skillset to do it.

There is some granularity in terms of prompt engineering with ReACT/LangChain, which does require a machine learning background to make any sense out of it because it's very arcane. But that's not what these job openings are looking for, yet.