Arguably, I'm not as concerned about "every action of every user on every machine" as I am the exceptions, and the usability issues the aforementioned "security platform" causes in terms of end user efficiency are probably not offset by the perceived security gains from your POV.

Fwiw, for as much rightful criticism as Google receives for things like killing consumer products and behaving badly with user data, its internal IT runs better than -- in my opinion as an ex-employee -- any other large enterprise in the world. And it's secure.