You may want to reconsider your knowledge of the current state of neuroscience. It seems to be lacking
No, no it isn't.
Is neuralink even claiming to be working on input to the brain? I thought it was just trying to read the human brain.
The advertising potential of writing directly to the brain is too big to ignore. Instead of hoping that a portion of viewers will buy the product, it's much more efficient to simply modify their desires directly. Sure, it will put a bunch of marketing folks out of a job, but such is the march of progress.
I already mostly feel like an NPC so I am sure this will get rid of that uncanny valley.
I don't think it will necessary "write directly to the brain" but rather just act as an extra sense of sorts. Which would still be extremely cool—I would personally love to experiment with giving myself all sorts of new senses, or even just finding patterns of stimulation that feel particularly nice.