How is high-functioning Asperger's the same as a depression?

And yes, in a sense you literally get a mental disorder the moment you get diagnosed with it. They are just human made up boxes of symptoms that seem to be a pattern. Two people that both share a mental disorder may share nothing in terms of pathology. We just don't understand the brain. Let alone the personalities the brain is capable to project.

So in the same sense Einstein could have never had Asperger's. Einstein died in 1955. Aspergers was officially recognized as a disorder in 1994. And it was eliminated in 2013 (at least under the DSM-5).

I am not against the idea of diagnosing disorders. The advantage is that you have some idea about what treatment will be effective based on people with the same symptoms. So you hope that all people with the same diagnosis benefit from exactly the same treatment.