I have just received a review claiming the reviewer is confused as to why professional musicians would "now join a local band" in my latest book. To make it clear that this isn't constructive criticism, I know many real-life professional musicians who've joined local bands and, like the characters in my book, they play in different bands simultaneously.
It's astounding how some people just skim-read through books and make incorrect assumptions in their reviews. It's like the judge in a writing contest someone told me about who marked a whole book down because the hero reminded her of her ex-husband. Or another judge who gave a book bad marks because "men don't think the way the hero in this book did". It turned out the writer of that book was a man himself.
Also, some authors who don't feel confident about their own work deliberately nit-pick other people's work to feel better about themselves. This has happened to me a few times and it's rather childish behaviour.
There's a reason the word "assumption" has the word "ass" in it, and I'll be mentioning that in a future book.