Official Q&A: VEXU 2020-2021: Change Up

In Q&A 607 link it was stated that "tubing, sheet, plate, angle, etc" are examples of raw materials that are legal for use. This was later corrected in Q&A 613 link to clarify that Angle is not a legal type of stock material due to the last paragraph of VUR3, which states:

Similarly, pre-drilled or extruded metal, such as angle aluminum, is not permitted, unless it can be found on www.vexrobotics.com.

However, tubing was noted to still be legal, as it was said that parts manufactured from tube stock are legal. However, tubes made from materials such as aluminum and steel are often manufactured using some form of extrusion. Even billet aluminum is extruded into its block shape. Since many of the materials that may be considered "stock", and even ones that are explicitly legal, are manufactured through extrusion, will the GDC please clarify the intent of VUR3? Specifically, is VUR3 intended to be based on semingly arbitrary requirements such as the exact manufacturing process of the stock material, or is it intended to prevent teams from simply purchasing parts that they may not otherwise have been able to manufacture?