I'm also e-commerce-adjacent, but I believe fast-fashion (especially synthetics) is bad for humanity. Sure, people are making loads of money[1], but it's an ecological disaster in the making.
1. Me included, but only getting a little. Shein is getting ALL the money.
Sure, it's totally possible for a well-made synthetic garment to last as long or longer than a natural one (many of our dead uncle's double knit polyester slacks are still kicking-it in a thrift store somewhere). But we're talking here about "fast fashion", which is entirely cheaply made garments that, by definition, have a short lifespan. These are typically synthetic fabrics or cotton/polyester blends.
There's nothing wrong with mercantile pleasure per se. It's probably an incentive/reward mechanism in the brain to encourage comfort.