Just as @JesseLunsford points out in this thread, there is no mandate for RDs to "follow" official USDA/HHS dietary guidelines when they counsel patients.
However, that's not the whole picture. 1/
There have been other situations that are compared to Ms. Presley's, but they have involved other factors (unproven supplements, etc.) not just dietary information. 2/
I could go on about my own experiences (getting a D on a "personal essay" that suggested that maybe the original DGAs weren't supported by science - a claim acknowledged by the authors of the 1980 edition & reiterated by Walter Willett.) 12/
What we are talking about rather are values, specifically the values of white, upper middle class professionals. 14/
And, until we're told otherwise, "eating right" = DGA. 15/
(As an aside: how many dietitians went into the profession as a way of naturalizing their own disordered eating?) 17/