What cases does the notice in the product description stating that it "does not constitute a defect" refer to?

In the product descriptions of MARGESHERWOOD, there are several places pointing out in advance that certain things are not defects. Grouping the items together, they divide into things that were already on the material before it was made and things that occur during use.

Leather belongs to the former. Small spots, tendons, and wrinkle textures are considered to appear during the process in which natural leather is formed, and slight scratches, wrinkles, or press marks are also not deemed defects^[1]. Generally, because natural leather uses animal skin as is, the texture and thickness vary by individual, so the same pattern does not appear 2 times. For printed materials, the standard shifts to the arrangement of the pattern. For the light grey printed suede+crinkle option of SOFT BOSTON EW MINI PIPING, the position where the pattern is placed varies by product and may not be identical to the detailed images^[2]. Knitwear belongs to the side that changes after wearing. As friction accumulates, pilling rises to the surface, and this does not serve as a reason for exchange or return^[3]. Generally, because knitwear is knitted with yarn made by twisting short fibers, when subjected to friction, the fiber ends come out to the surface and clump together. Metal hardware gradually fades. Plated hardware may lose its luster over time or develop scratches and discoloration, and in this case, it is not only not a defect, but after-sales service is also not available^[4].

While these are changes that can be left as they are, there is one more item of a different nature. Discoloration, color transfer, and damage caused by contact with moisture or chemical substances are difficult to reverse, so after-sales service is not possible^[5]. hmmm, if the preceding items are notices telling you how to view things that have already occurred, this item alone is closer to asking you to be careful before it happens.