I'm frankly curious about the thought train that led you from "Carmack makes a technical post about gamma correction" to "he can't lead in a tech company"

He misses the forest for the trees. It's not this one case, but it's a pattern with him. He's not wrong about these things, but when he calls them out rather than calling out more meaningful, high-level issues.

They were only using 5% capacity of their datacenter GPUs. They could have trained their deep learning models close to 20X more, etc. He mainly just said it was a signal of their inefficiency as an organization and was a final straw, not a sole reason. He detailed many other major misallocations of resources throughout his time there.

But it's the wrong straw. The reason people played with their Oculus for a day, then left it on the shelf wasn't insufficient model training.