Eating disorder as a service does indeed sound like a business plan.
Some people would use the GP's idea that way, yes.
But that's absolutely not what he's describing. He wants not to think about it, that's exactly the opposite of a disorder.
Anyway, an LLM assistant is also exactly the worst technology to use there, on every dimension.
People with eating disorder do not want to think about it, they cant stop thinking about it. They create all kinds of systems for themselves, but mind cant stop - and restrictions grow.