I don't think it realy matters in what form information is being fed into the brain. Whether you get information into the brain by making it look at something, or read a book, or by neuralink, is irrelevant. The brains capacity to process the information, and store it, will still be the same.
If you bombard it with more information than it can handle, it will just start to ignore most of it.
A constant overload of information will more likely damage the brain, than improve it.
The only way this would bring superhuman cognition any closer, is by making brains communicate with eachother directly. Theoretically that would allow us to learn from eachothers experiences.
However, i don't know if our capacity to do that, would not require some experience in a certain field to be already there: could you learn to play a musical instrument like a virtuoso this way, if you've never played that instrument before and there is no information on how to play that instrument precipitated at all, in any of the neural pathways of your brain? I think you would probably not understand the mental content fed to you.
There would simply be no mental framework where it could be fitted into.
That is at least what i think.