I'm not suggesting this occurred in this case but one thing I've learned through working in recruiting is the reason why the NHS is forever struggling.
People seem to visit their GP for reassurance over trivial issues, often because they want time off, want a diagnosis, and are apparently only satisfied if they get a prescription and a "label". They do this because "everybody else does it". No, they don't.
Once they have a "label" it very often gives them some sort of social advantage (extra time in tests, an ongoing excuse to be excused from school/work, financial income if it is classed as a 'disability').
When it bites them in the arse and the "label" prevents them getting something they want, such as joining the forces, they suddenly find the glue on the "label" is not quite so easy to remove. They then set about trying to prove their Doc was a complete imbecile and misdiagnosed them, totally at random and then set about wasting everyone else's time and money trying to prove: "I was only feeling down when my dog died, it wasn't depression", "my Mum kept getting me inhalers as a precaution, it was never asthma, it was a chest infection", "It wasn't ADHD, I was just an ******** at school - my Dad wanted the Benefits money", "it wasn't shin splints, it was just growing pain" etc.
No wonder angrydoc is angry, it hugely pisses me off too. Pardon the pun.