In my line of work, it is imperative to be able to write and speak properly and with complete clarity. That said, I come across attorneys often and have close relatives who are dyslexic and ALL have made and make an excess of $200K per year. This trait or “handicap” has absolutely NOTHING to do with level of intelligence.
Others’ grammatical errors just roll off my back. That is what microcassette recorders and dictaphones are for. There really isn’t any need to write in this day and age when there are many competent people available to perform these tasks for you.