People seem to really simple, strong narratives. It used to be that Edison was a titanic genius who invented countless things solely through his own brilliance and hard work. Now he's some kind of scheming con man who did nothing but steal the work of others. Nuance is not popular.
It's funny because this is EXACTLY how it played out with Japan in the mid-20th century. "Japan can only make cheap copies of our stuff!" They even joke about it in Back to the Future.
People joke how we live in Idiocracy now, but Back to the Future really nailed it with the dystopian world ruled by Biff the billionaire bully with no class or taste.
>My experience has been that this isn't limited to engineers.
To some extent, but the most severe form does seem fairly unique to engineers, specifically programmers. That is, I've met many arrogant lawyers and doctors, but never a lawyer or doctor who assumes they could program a computer due to their legal or medical expertise. But I've seen many a programmer assume that because they are proficient in programming they can confidently and authoritatively expound on all other areas of human endeavor (those being obviously inferior and trivial in the face of their own).
This is going to be framed in the usual "weird Japan" way but it's not at all limited to Japan. I don't know if similar studies have been conducted in the US or other other countries (and, as another comment note, the supposed study on which this is based isn't linked in this article), but phenomenon like r/MyBoyfriendIsAI and countless stories about people all around the world becoming entranced by "relationships" with AIs indicate this is not at all unique to Japan. I suspect a sadly large number of people everywhere feel this way, they just want someTHING to talk to if they can't/don't have someONE.