Author A spends a year writing a fiction book. They are not well known in the industry. They publish the book, it sells very few copies (perhaps none at all).

Person B (a well known Instagram influencer with tens of thousands of followers) downloads a copy of your book. Replaces your name with their name as the author, and promotes it as a book they've finished writing. Goes on to sell at a very profitable rate.

If your answer is NO this should be illegal, what about if Person B searches/replaces all definite articles with indefinite articles, or changes all the proper nouns to begin with "schmla"? Where do we draw the line?

If your answer is YES, then my gut instinct tells me you are neither a writer, composer, or creator in any meaningful sense of the word.