It already does and a BCI can decode thought into speech and it can also draw the images you picture in your mind onto a screen but only in black and white. There’s headsets and implants that already work. Accurately both in image and speech….

The brain is a binary computing system of synaptic relays and electrical neuronal impulses, it is very simply to decode speech in the temporal lobe part of the brain which is responsible for thought and hearing to convert those thoughts into readable speech… via BCI… it already works