Human Intelligence is an Illusion

[I_am_not_mafia]

No they don't.

Experiments suggest that our brains decide what we're going to do it before we're conscious of it.

This is very different.

Are you conscious of all the visual processing going on in your brain to determine that what you are looking at is an apple regardless of whether someone moves it up, down, sideways, further away, throws it, partially hides it or shines a blue light on it?

Moravec's paradox tells us that the majority of intelligence is devoted to these kind of tasks that we take for granted. Consciousness is just the tip of the iceberg.

If decisions are made in the brain before we are conscious of having made them, then "we" didn't make them, our brains did this unconsciously,

No because you are your brain. You are more than just the conscious part of your brain. Think about it, you must be, otherwise what are you conscious of?

You are conscious of your body right? If I stab you then you feel pain. If you weren't also your body then you wouldn't be feeling pain.

Unconscious processes are natural processes since a vital component of intelligence (as many would define it) is conscious choice. Without it there is no distinction from any autonomic response in the body.

They are all arbitrary distinctions. Intelligence is also a natural process, regardless of whether it involves consciousness or not.

Would you consider instincts to be natural or intelligent?

Both. You are making an arbitrary distinction between natural and intelligent without any reason to. Intelligence is natural, unless it's artificial intelligence, which is something entirely different.

What I propose is that humans possess highly evolved instincts masquerading as free will.

What is free will? Will free from what? why do we need such a concept? Is it useful? Seems to be sending you round in circles trying to make sure there is a use for it.