Kafka was himself an author. I think authors like to believe that their work changes people, that books and other writing are not simply content to be tailored

Kafka was himself an author. I think authors like to believe that their work changes people, that books and other writing are not simply content to be tailored for specific demographics. His use of 'we' in the quote sort of suggests that he might be speaking mainly for himself. Perhaps he was just trying to explain his particular kind of want.