That's like saying that no one is forcing workers choose to accept horrible working conditions, so they are equally to blame for agreeing to those conditions an

That's like saying that no one is forcing workers choose to accept horrible working conditions, so they are equally to blame for agreeing to those conditions and not choosing another job. But in practice whoever has more monopolistic power is the one setting the rules, and in this case it's undoubtedly Amazon. And just like in case of poor working conditions, failure of regulation is to blame for Amazon's ability to do that. Specifically in case of audiobooks, a loophole in the first sale doctrine as someone else mentioned. Blaming individuals for making selfish or myopic choices is appealing but is not going to take us far out of this situation.