Brains do not have the tools computers have. You cannot compare them, its like saying: my car is a machine that moves, people are machines that move, therefore they work the same. Computers and their parts literally store information because they have tools designed with those abilities, brain cells do not, they do not exist.
What they do in the academic study of these things is make conjectures and then claim those conjectures are proven, when you seek out the proof it is all based on computer modeling, not proof. Look, it is quite simple--thought information is not understood by science, full stop. They do not know what thought is, what it looks like, what it is made of, where it is, etc. The only thing they know is what you and I know, that we "hear" thought.
Everything else is speculation, but since scientists and academics don't get money based on saying everything they know about thought, i.e., non-physical mental information is...nothing, therefore they will more often than not pretend they discovered things about the mind and brain when in truth they have only made speculations, with computer modeling.
Brain cells cannot, I repeat, cannot perceive, or comprehend, and therefore cannot process thought information because they do not have computing tools.
It is like expecting your old analog TV to start working like a smart TV, why can't it work like that? Because the smart TV has literal processing tools, the analog TV does not.
Brain science has shown exactly zero evidence, and your claim that they have "conclusively" shown "how to think" is simply false. Brain cells cannot even perceive, what to speak of manage thought information, aka think.
All you will find is people saying, like you, that these studies exist, but when you read them, it is all computer modeling, not actual physical proof, because again...Brain cells do not have processing tools like a computer because 1. There are no databases of information in brain cells, and 2. No tools to process information from databases.
Without those things, any so-called "thinking" is literally impossible because thinking requires 1. Information to process, for example thought is always, always, in a language--which means at the least you need a database of word meanings, database of linguistic rules, database of grammar etc. and 2. Tools to process that information, tools which can "literally" see and interact with language databases--brains do not possess anything at all like those required tools for information processing--and even if they did--they do not possess the ability to even be aware non-physical information exists--because remember, thought is non-physical, not made of matter, and the only thing we know that can interact with non-physical non-material thought substance--is consciousness, which is also non-material and non-physical.
I mean take out your processor and memory from your computer and see what happens when you try to use it. Or try talking to your computer with your thoughts and see if its speech recognition tools can understand your thoughts. Brains do not have speech recognition tools, what to speak of tools to perceive and comprehend thought--without that, any so-called processing of thought, aka thinking, is not going to happen. If an academic, dependent on grants or other sources of money tells us anything different, they are lying.
And just because if you injure parts of the brain then intellect may be affected has nothing to do with how intellect functions. To give an example, if you damage your TV you may not see the show very well or not at all--does that mean the show is being made by the TV? Nope. The show comes from a data source, i.e., a recording of the show or from a live event--similarly if parts of the brain are damaged and people are intellectually affected that doesn't prove the "show" i.e., the processing of thought, memory, intellect--is being done by the brain--all it shows is that the brain, like a TV, is needed to work properly to be able to function properly so YOU can receive the show.