Hello. My name is Regina and I write for a living.
Because of that fact, grammar oversights that seem small/silly when made by a non-writer leave burn marks on my immortal soul.
This happens to all writers.
These burn marks of shame are not hidden. They are eternally on display so that all may judge us on our human mistake. Writers occupy a very specific class of humans. It is a class where errors are not tolerated, otherwise everyone will believe that you are an imposter writer and not a true writer.
Too many mistakes and they might wonder if you are an imposter human, too.
Writers live in constant fear of the typo, the missing word and the words we forgot to remove when we edited a sentence.
Now I know why so many writers are alcoholics. Typos drove them to drink.