I wonder why we don't use the CIE XYZ color space for monitors - in practice, humans see much fewer blues than reds, so having the same pixel dedication to both

I wonder why we don't use the CIE XYZ color space for monitors - in practice, humans see much fewer blues than reds, so having the same pixel dedication to both seems like a waste. I'm not a panel manufacturer here, so I imagine it is hard to architect a panel with subpixels of varying signaling depth, right? Also, are there even 12-16 bit color panels in production? I like to hope 4k / 8k mean the end of the pixel race, because we really need adaptive vblank (from Displayport) of at least 100 hz before we keep pushing the pixel density. Hell, most of my family don't recognize the difference between 480 and 1080p already because the colors are so bad on most consumer tv panels.