"People use it in those places because it's free, not because it's particularly good"
So is BSD, but that's not used nearly as much, even though a lot of the companies using Linux would find that the pesky GPL stuff is no longer handcuffing them.
FWIW there are "linux" distros out there which have been rebased on BSD kernels.
I use both and have done for more than 20 years. The issue isn't Linus - whenever he's called someone out it's because it really was needed - it's more that developers in this kind of arena tend to be special flowers with talent in an environment where collaboration may bring uniformity but it also eliminates innovation. Those devs need to exist, but so do people like Sarah who have the time and patience to rip that innovative code apart/rewrite so that lurking bugs can be found and nailed. The former often see the latter as a threat and react as you'd expect.
In many ways it's like the constant battle between architects and quantity surveyors.