As a purely sociological concept, applied to examining the
possibility of people playing such a role, it's fine, but it was never established as particularly accurate, hence it went into the wilderness that is failed sociological theory.
So, to have it resurrected by self-serving psychiatrists as a
post hoc piece of reasoning as to why people with ME might be somatising their illness is a bit insulting to anyone who knows the history of that particular concept. I even wrote to the main author of the first paper to advance the reasoning, and told him that, but he didn't reply to me. Psychiatrists hate being lectured by psychologists, especially if they're not clinical psychologists.