If you are a software engineer and are able to blog, you are really at the high spectrum of functioning. My guess is that the gulf between the author and people with autism who are less functional is greater than between a "neurotypical" and the author.
Neurotypical and autism isn't binary. It is a spectrum and even within autism, there is a huge spectrum. The author speaking on behalf of all people with autism seems not that much different than "neurotypical" people speaking on behalf of people with autism.