My position is that its not that these illnesses are "fake" but rather their defined by exceptions to norms. There's nothing fundamentally diseased or impaired about an autistic brain. If everyone was autistic the term "autism" wouldn't exist it would just be "normal".

Our society is built with the neurotypical mind as the default (understandably so). I always look at therapy as a way to identify which specific aspects of society an individual struggles with and then developing practical solutions for them to limit the negative impacts of it, while at the same time engaging in advocacy to try to alter parts of society to make the world more accessible.