So as you noted yourself, the work we're doing in this course is composed completely of exercises, and each exercise serves a purpose. it is by no means a matter of "this is how you're going to be drawing everything forever", but rather that we do the exercises here in a specific manner because we've seen these approaches to far more effectively target and develop students' internal spatial reasoning skills, which are the core focus of this course.

Since January, I've been updating the video material for Lesson 0, so that it explains this to greater effect. I would strongly recommend that you give the new videos a watch, so you can more fully understand what the course as a whole is attempting to achieve with each student, and how we work towards it. Moreover, in my explanation for the 50% rule, this particular point comes up in the fact that I do not require students to draw in this manner when doing their own work - they're welcome to be as loose and explorative as they wish.

Ultimately what we do throughout this course is intended to develop your instincts - that is, exactly what you're relying upon when you draw loosely and quickly. If we attempt to use the things we're trying to develop, as we develop them, things tend to get messy. But, in being more purposeful and intentional in how we put our marks down, thinking through every action here, we develop an underlying need to think before we draw, something that manifests in split-second pauses preceding putting those marks down, which ultimately results in marks that are still loose and exploratory, but still working towards a more concrete direction, minimizing waste and increasing overall line economy.

So, think less in terms of "rules of art", more in terms of developing greater overall control over the relationship between your intention, and the marks that fall upon the page.