Weird how right-wing paranoiacs are obsessed with the idea of Bill Gates wanting to implant us all with microchips when Musk is funding research into exactly this, and these same people think the sun shines out of his arse.
Your expectation would be correct. Of course, on paper, the possibilities are glaringly dystopian, but they also include some profound therapeutic solutions, e.g. effectively curing blindness owing to optical damage (rather than damage/mutation in some cortical area related to visual function).
Or perhaps some impact thats able to latch onto some linguistic / linguistic-adjacent region of the brain, enough to translate volitionally modulated activity into some binary output for paralyzed people to communicate more easily than eye blinking. Although here I'm really not familiar enough with existing solutions to gauge whether or not brain impacts would even be warranted.