Not to back up the "all success is luck" meme but I would put it like this.
There are any number of people who might have the skill to write a kernel.
His "luck" was being the one who put in the work at the right time, caught the attention of other like-minded individuals to make it a community effort, and very effectively filled the niche that needed to be filled at the time. Without him it is fairly likely that another project would have eventually emerged, or that BSD would have been what people rallied around. And we'd then know another personality or group of personalities or company as the face of the open source operating system.
That is not to say he doesn't have a crazy amount of skill.
But that skill and that "luck" don't necessarily make his opinions infallible especially on something as asinine as this.
That said, you don't like his management style don't work with him or with a company that requires you to work with him.