Food stuff is one of those quirky/interesting things.
I have a friend who is a psychiatrist over in an eating disorder clinic who smacks me up the backside of my head on a regular basis... Because I have eating-disorder-as-a-side-effect kind of thing, and like most of my stuff, I make fun of it. (I'm not anorexic. I have an eye disorder. I can't see myself right). Come to find, when my ADHD is medicated the "eye-disorder" goes away completely. It's a side effect of being hypersensory & constantly aware of my body at all at all times. Ditto, various choices in my life have accentuated certain things (like modeling + cocaine, or military+no food (long story), or athlete+being broke). Plus several other things. All boil down to I could (in theory) treat the "eye disorder" as a primary thing... But it's not very useful (for me). Because it's other things that are causing it (ADHD or PTSD).
She smacks me, because eating disorders are usually secondary to something else (abuse, trauma, GAD, depression, ADHD, SPD, etc.). Which is why, at her clinic, most of the professionals specialize in non-ED issues.
I'm one of those lucky people who have a whole bunch of super-unhealthy coping mechanisms to choose from (I'm not being sarcastic. It's lucky either way: either the 1 fall back coping mechanism lets you know immediately -aka lucky- or you have a color wheel of bad ideas to choose from, so you rarely do yourself he kind of sustained damage a single bad idea results in -aka lucky.). If food were my fall back, I'd go chill with her in her office. She's amazing. And she works really closely with the primary care psychologist who is addressing the root concern.
It's a nice space for people, you know? Address the main concern with one person, but be able to devote a similar amount of time to reworking "bad idea" coping mechanism/ secondary disorder into something healthier that is also on board with the primary concern.
For me, that's not the case. "How's your eating?" Isn't a good tell as to how I'm handling my PTSD stuff. My diet/exercise can be spectacular, while I'm out redefining the word "slut" (I actually call it catting around, from tom-catting around, or hunting), or picking fights, or doing myself an injury, or getting obliterated, or getting in a lousy relationship, or spending 10 hours a day exercising, or, or, or, or. And when my trauma stuff is manifesting in my diet/exercise ... It doesn't cause the kind of anguish to stop as it does in people for whom that's their primary coping mechanism.
I get angry at being asked to give up a crutch (I'll beat you with it, before willingly giving it up)... But I'm not lost without it.
That's a big part of what she does, specializing in eating disorders. Helping people who are lost without their ED learn new things that they can apply in their lives.