Earlier quoted context omitted.
What I want is Little Snitch on steroids built into the OS where every process, You cannot trust an OS you cannot build yourself. That's why I see Linux as the only option for professionals and privacy minded people.
How do you know there are no outside efforts to log linux activities? There's a lot of source code to go through and is it possible there are callbacks even within OSS that most people are not aware of?
To prevent standard data leaking or rather stealing like in this case, linux is a quite solid choice.
But if you think you are a high profile target, you should probably learn how to deactivate Intels ME and co.
And if you are really paranoid, you should assume that there are hardware backdoors. But what do you do then? Build your computer from scratch?