Well, my cousin was a us navy cryptologist that is colorblind and he could tell the nuance of red and green on the screen. … also, by your logic, if we cater to colorblind, there’s no point in using colors at all for any purpose.8% of men are red-green colour blind.
Better factor another option
Sometimes people with disabilities have to suck it up, adapt, or move on. We can’t all live life by the lowest common denominator.