You're talking implementation. I'm talking practice.

Yes, selinux is open source, I can look up the documentation, etc.

But since I'm not IT it isn't my job to manage selinux - from my perspective it's just something that rears it's head when there's a policy I didn't know about that interferes with me running my stuff.

So from the perspective of it not justifying Inflated wages, you're probably right? Anyone can learn it. But in my experience few developers do.