I understand what you're trying to say, but not every author is trying to make a career out of writing or publishing books. Maybe they aren't trying to sell a million copies. Some like myself just want to tell a story, leave a legacy. Even if their book gets lost in the multitude of published work, it's still out there. Maybe they aren't trying to reach everybody, but whoever needs to read it and with God's help, there is no telling what could happen. Not every author is thinking about money, sure you hope to get enough money to recoup your costs, at the same time it's quite an achievement to hold a copy of your published book in your hand, to received the admiration of your family and friends as they celebrate this achievement, something that many, many aspiring authors will never do.