This is exactly what I was going to comment on. Everyone I know, including me, who has done a PhD, even those people who got it over and done with as quickly as possible,* were absolutely consumed by and obsessed with their thesis topic. It's impossible to do a half-decent job without becoming somewhat obsessive.
*which, by the way, is nothing like 2.5 years. My husband I think completed his more quickly than anyone else I know, and that was still over three years full-time, and he wasn't commuting across the UK daily, working night shifts, and looking after newborn babies and needy parents.
Even now, 20 years later and having long ago abandoned academia, I'm still hypersensitive to anything vaguely related to my thesis, and still mentally file away new books, articles, discoveries, etc. that would be relevant. My husband is still something like the 5th most informed person in the world when it comes to the life and works of his PhD subject.
Arday's bizarre ghostwritten 'memoir' (bizarre not least because why get a ghostwriter to do such a BAD job?) makes it explicit that the PhD is just an ego trip. Nothing that
@Valiofthedolls has posted (and I've read all the extracts here) indicates any interest at all in his purported subject. I mean we know why that is - it's because he didn't write it, he didn't do any research, he just patched together a mess of other people's work and slapped his name on it - but it is genuinely insane that it's just in plain view.
i've read memoirs, biographies and autobiographies of academics, and while they might include their life stories and personal histories, those are always interwoven with the actual subject that they fell in love with (or happened to end up focusing on). The putative subject of his PhD is invisible, because he really knew absolutely nothing about it.
What is really mind-boggling is, given that, how he got the PhD at all. It should have been picked up at the viva, and it obviously was to an extent - the two versions of the viva (from the draft and the published version) indicate that it was not an easy ride. But how and why was it awarded at all?
It is not unknown for people to fail their vivas. I knew someone who did (he ended up clearing his stuff out in the middle of the night and was never heard from again, at least not by me). It is common to pass with corrections - usually minor corrections (this is what I had), but sometimes more substantial revisions are needed.
There is no question that Arday should have failed at that point. I know all of the focus is on Cambridge, understandably, but for my money, Liverpool John Moore's have a lot of questions to answer. Possibly even more than Cambridge. They awarded him the PhD, and then they said that the plagiarism allegations were false.
The whole thing STINKS.