Since When is a physio a doctor? When he's an ESA Assessor

I would say I've had a most horrible day, went back for ESA assessment as did have one with a nurse on 20th July, tho she postponed it as she'd thought I'd be better assessed by a doctor given me being a prem baby , and I had difficulty breathing. So went along to another assessment  today ,( which was running 2 hours late), when the "doctor" said about his qualifications , he wasn't a doctor at all but a physiotherepist. My main issue is Aspergers and mental health issues, and WTF would a physio know about them?