Earlier quoted context omitted.
Simply not necessary for normal applications running on my local desktop. And yes, I do work in security.
I don't care if you work in security - the fact is that I have to completely trust every application that I want to run on Linux, which is unacceptably bad, and "Simply not necessary for normal applications running on my local desktop" is factually false (unless you're using some "gotcha" convoluted definition of "normal"). A sanely-designed OS will provide either capabilities or sandboxing - the tech has been around…
You can run something like Qubes if you want better isolation.