You are making an extreme case out of this. From my own personal experience with people I know well, one is dyslexic, several dozen were simply poorly taught at school and don't see the point of bothering. There is nothing wrong with their ability to use words, they just don't care enough to take trouble over their spelling. That is not a disability. It is an attitude.
I won't comment on this further. It is clearly a sore point with you, and undoubtedly with some others. I have no wish to make this more than it is, but I will say what I believe to be true, which is what I have done.