She just wears the same type of outfits over and over again as well so it would benefit both herself for flexing on the gram and the environment if she started buying higher quality items in a lesser number.It's because she'd rather have quantity over quality. 10 pairs of cheap trainers instead of 1 decent branded ones. A wardrobe full to the brim of cheap clothes (mostly the same) instead of a decent capsule wardrobe.
I'm all for budget buying but when you have the means to, it's ridiculous not to buy more sustainable better quality clothes.