I think that will be true for many lifters. However, if you are tall or long-legged and you squat inside a rack to below parallel, your shins may very well not be parallel. I'm 6,4. For a long time, I noticed that no matter what I did my knees had to come forward some to lower back to box with control. I thought I was doing something wrong. But when I started trainign at a key club that has a monolift and I got to use a wider stance, I finally figured out what Louie Simmons meant in those articles.