Perhaps “blame” isn’t the best word here. I am often guilty of poor word selection. Autism was attributed in the first sentence:
“The ability to focus on detail, a common trait among people with autism, allowed realism to flourish in Ice Age art,...”
As I said on another post, a great deal depend on one’s defintion of “autism”. A better more generic term might be “monomaniacal focus” as someone else had said.