I’m sorry; none of this is new to me except the absurd price tag.
Historically I've done some heavy spreadsheet work where the resting position of my hands which minimizes movement is right hand on the mouse, left hand on the 10 keys. On a normal keyboard that has the disadvantage of causing a "closed" posture which isn't entirely comfortable.
Outside of that kind of niche use case though, it definitely feels like a strange choice for developers.
To me it reads like an ego trip rather than any kind of righteous vendetta against the author. Implicit in "look at the dumb thing this other person did" is "I'm smarter than them because I noticed the dumb thing".