It's not worth it.
So I said, but it's not about the money to me.
He went on to argue about how he wasn't talking about the number of copies sold because he knows that isn't usually a whole lot. He was saying that if 10% is all an author gets in the first place, then it's NOT WORTH IT.
My reply: Good thing you're not doing it then.
I'm lucky because I'm not the breadwinner in my house. I don't need to earn a lot of money for us to survive, therefore, writing is a perfectly acceptable career-choice for me. My husband looks at it like a math problem: Calculate the number of hours spent researching/writing/revising/etc and then calculate what you might make per book and... yeah, I'm sure the numbers wouldn't come out all that great. If you put it that way, maybe it's not worth it. But I love to write. I would do it no matter what. I keep doing it, despite the rejections, despite the busy-ness of life, despite the occasional (sometimes more frequent) feelings of suckitude. I will always write because it makes me happy. And for that reason alone, it's WORTH IT.