In the end, I'd say that HR person did your brother a solid.
To be clear, not all of the jobs I've hired for sucked. But there was one project that was designed to chew up your soul (mine included), and we had very specific requirements- and people that had "extra" skills weren't qualified. I learned A LOT from that project.
In our area, we had 2 teams racing VERY FAST to 2 different objectives:
1) migrate ALL code and data to the new system (because it needs to be available on the new system) AND
2) archive everything (because we might sell all of our stuff and be unemployeed)
It was gut wrenching to look at code that I put my heart and soul into and know it would never run again. Or to look at code with comments like "I just threw this garbage together - it needs to be fixed, circa 5 years ago" and know it would never be fixed.
Or those automated gun turrets?
He was going to transfer to a different company and was told that company rules meant he had to go through HR "as a formality".
He was blocked by his HR interviewer on the grounds that he was too successful and therefore wouldn't be "hungry" enough for such a competitive position.
He couldn't believe it. They didn't want someone with a proven record of repeated long-term success?
The person who was trying to recruit him was furious, but as my brother said, this was indicative of a wider problem, and so he declined to move there. Instead he won his Industry Award for the following year at the company he did move to....