I interpreted this sentence as declining to discuss it, but yeah, it's pretty obvious.
Yeah, it probably wouldn't have mattered to him one way or another, since he was apparently a happy and gainfully employed adult, but it's helpful to remember that autistic people have always been here, not some recent invention or "epidemic".
Diagnosis in and of itself is often welcomed by people with Autism. This is mentioned in all the English guidance (The Autism Act 2009, the Autism Act Statutory Guidance 2015; the NICE guidance 2012, the national strategy "Fulfilling and rewarding lives" and the newer national strategy "Think Autism") which all talks about the importance of diagnosis as a first step to understanding yourself and getting other people to accept you as you are.
Diagnosis is also an important step in getting services you need.
That said, there's a high chance of comorbidity when it comes to things like OCD and AD(H?)D, and especially the latter can be treated.
(I'm not a licensed psychologist, so don't take this as advice not to get diagnosed. Just providing a counterpoint.)