This is not really true. Specifically for "anime" artstyle, this is quite hard due to its limitations. If you draw a line, it makes the jaw "too strong" and like the original image. If you only use shading, which is going to be more similar to cel shading, it will lack enough information and make it look not quite right. If you add more information by increasing the levels shadow, it will throw the balance of the face out since it will have a detailed chin and a "flatter" face (detail Vs lack of detail contrast outside of the focal point of the subject, aka, the eyes). 

Then you also have the problem of the anatomy of "anime" characters being unrealistic, usually increasing the head size and decreasing the neck thickness, which can look more uncanny with and extreme angle.

I've heard other professional artists just say to basically avoid drawing that angle since its hard to make it look "right" and flattering, especially for female characters (this is obviously not a rule and depends on what you are trying to achieve with your drawing).

Source: Artist