True,but some ppl can 'train their brain' not to react the way it usually does.The first one that comes to my mind is boxers.Some train their eyes not to blink during a fight,even when they're punched in the face.Many monks and martial artists practice extreme focus to block out pain,until they don't even feel it,and thus don't react.These are mediocre examples yes,but they do point to us having some control over what our brains do.

We can train our brain yes, but if certain chemicals are released we will have specific reactions, just because we do not act out those reactions however does not mean we have control of our thoughts, just our reactions.

Ah but control over our reactions is control over our actions.Which suggests that we aren't just a simulation.

Yes, but it is not the same as choosing what you think.

That's a good point

We can train our brain yes, but if certain chemicals are released we will have specific reactions, just because we do not act out those reactions however does not mean we have control of our thoughts, just our reactions.