So why am I torturing myself? Because I want my manuscript to shine like the Michael Jordan's bald head. I want to put the best possible manuscript I can send into the black hole that is called slush pile. And I don't want my editor/agent be moaning rookie mistakes. That's why I have a beta reader, crit partner, writing resource books, read book after book in my chosen genre and take class after class to hone my writing skills.
I sacrifice hours of sleep after working twelve or sixteen hour shifts in pursuit of writing perfection. Or close as I can get.