A strong ability to be meta-cognitive is perhaps a byproduct of the mind being initialized in a way such that the self, as a construct, was not supported.
Self is always an artificial construct, but most believe in it, because they have been taught to believe in it. And, of all the beliefs we are inculcated with that we stubbornly resist questioning, self is generally the strongest.
Full internal deconstruction of self leads one to a precarious position as a living creature, so it is perhaps unsurprising that this feature is not enabled by default. It is painful, and it becomes impossible to hide from the darkness.
That being said, i don’t think there is a clearer platform for thought than a mind devoid of the illusion of self.
Like a telescope outside of the obscuring and comforting effects of the atmosphere.