I agree that it's not strictly necessary. I've read a book that didn't use the word "is", and the book Gadsby is written without using the letter "e". So it no

I agree that it's not strictly necessary. I've read a book that didn't use the word "is", and the book Gadsby is written without using the letter "e". So it not being necessary is not evidence that part of a language shouldn't be used, or that it isn't easier to communicate with that part of language. Sometimes curse words help express emotions.