Trying to understand your unconscious is like trying to understand space.
It's impossible to get your head around, and if you go too far, it will 100% freak you out.
I think this is why we avoid the topic. Because it refuses the neat and tidy lines of modern thought, we ignore it.
But the vast majority of human activity is unconscious, so it's a thing we should be talking about all the time.
And since we can't define it or codify it, the best we can do is build models that help us catch glimpses of it's hugeness.
Here's one such model, which I call The Golden Rule of the Unconscious: