So there's a lot of people tied into believing that the traditional response to the authorship question. In terms of actors, some people get very angry about it. ↗
Also, there are authors and publicists using the Internet to manipulate opinion, both positively for a work and negatively against the competition. I don't do this and can't stomach it, honestly. ↗
By reading a lot of novels in a variety of genres, and asking questions, it's possible to learn how things are done - the mechanics of writing, so to speak - and which genres and authors excel in various areas. ↗
The idea of copyright did not exist in ancient times, when authors frequently copied other authors at length in works of non-fiction. This practice was useful, and is the only way many authors' works have survived even in part. ↗
It's hard for children's authors to be accepted when they try to write adult books. J.K. Rowling is the exception because people are so eager to read anything by her, but it took Judy Blume three or four tries before she had a success. ↗