They also fail to acknowledge that contemporary unix, aka Linux in it's many derivations and flavors, is entirely malleable at the source code level by it's users. That is a feature provided by literally no other operating system that is deployable at scale, and is, in fact, the singular feature that drives it's adoption -- not only is it 'free', you can hack it together in any fashion you damn well please, and you can use it to build peer-grade native applications, typically with little more than a tip of the hat as 'overhead'.
tl;DR: Some folks might miss the point because they are not sufficiently motivated to engage the *nix world with the degree of articulation required to tap into it's less than casually accessible capabilities.