Didn't other people who went through the documents claim that the autistic person he dated was high function? Unless you are calling Tonka Saw and Andy Warski mentally deficient they claim that they saw the records and it was an opposing lawyer who argued that she had the mind of a child.
I watched that stream. It went something like this: "she had been doing well" says so right here case closed "SHE HAD BEEN DOING WELL" stop bringing this up oh my god "she spends lots of time on the computer and watching tv" see, she's just a normal person like everyone else stop talking about this holy shit.
So in other words, they picked out a couple okay-sounding bits, and then declared the matter settled. Obviously they are not mentally deficient, otherwise they would have read the whole thing instead of avoiding anything that might contradict this "high functioning" myth they've been pushing. I don't know why they are covering so hard for this guy.
Here's some parts they didn't read for the stream (there's a link to the whole document in the OP, the doctor's report starts on page 40):
Also "SHE HAD BEEN DOING WELL" is just a second-hand report (something her mother told the psychiatrist) with some caveats:
"High functioning
by those standards". She can bathe herself, though she has to be reminded. She can respond to verbal cues, if slowly. Compared to a person who cannot do this, she is high functioning. High functioning is relative to the really rough cases: the non-verbals, the corner-rockers, and the window-lickers. Not high functioning compared to the average person, which seems to be how everyone talking about this is interpreting it.
I don't want to seem like I'm picking on this girl. I'm sure she's doing her best. I only want to point out that a highly-educated 30-something man who thinks it's a brilliant idea to take over her care from her family so he can impregnate her immediately has to have some major fucking issues.