Your last sentence is precisely the tack she's taking to fight for sustainable practices in the fashion industry. Clothing is made with planned obsolescence in mind: cheap materials, cheap labor, cheap fads. She is fighting for fashion that doesn't force the buyer to buy a new wardrobe every other month.
Consider in our grandparents past, or even their parents; they would purchase or even sew their own clothing, and those pieces would last for years before needing to be replaced. That's the sort of culture she's trying to convey. Personally, I'm OK with investing in clothing that I know will worth the money. $200 for a single pair of pants that last me 5 years is much better for the environment than me spending $30 for a pair of pants every 3 months.