I seriously doubt he’s exceptionally good at anything if he can’t be good enough at one of the very basic things that even kids can be good at. Life doesn’t work this way. There’s probably an exception somewhere, as you said he could have one of those modern diseases, but it’s not a risk worth taking for society. It’s not efficient this way. Like hiring women for military or police jobs. It’s not making the world better.
Discussion
So a craftsman, say a woodworker, cabinet maker, film director, or an actor, cannot be exceptionally good at their craft if they are not good at spelling/grammar. Makes perfect sense 🙄
Not in the 21st century while working for a big retailer, no. They can be good enough. That’s it.
Why do you want to normalise and end illiteracy? I don’t understand your position.
I have an absolutely terrible time with math. Algebra 101 twists my brain so bad that even after 3 semesters & extra tuition I dropped it. When it comes to English I have no trouble at all and I had a teacher who wanted me to get into a career in writing. Some people have a hard time with writing but can be brilliant at other things, we are all different. Judging a person's ability to build high end computers on the basis of spelling & grammar in one email is not wise imo.
Grammar is basic literacy and can not be compared to algebra 101.
Otherwise I agree with your general statement.