Why assume that they are purchasing the bag for the Gucci label perhaps Gucci makes a higher quality product than a handbag you would buy at Kmart and therefore it will last longer and perhaps Gucci guarantees the quality of the bag and replaces it if it tears.
This. I have had “brand name” products that have been totally worn out, and sent back to be “fixed” and they did so without complaint (as wear & tear is under warrenty). Another time I regretted not buying the brand name, as the “generic” wore out way quicker than the brand & I ended up paying more. Sometimes its worthwhile to spend the extra dollar now and save later.