I just don't think that this is an accurate description of modern clothing. Cotton is not typically grown in unsustainable ways, and cheap 100% cotton clothing that will last for years is widely available at a variety of retailers.

But a lot of people don't want that. They want comfortable stretchy clothing, accepting or not realizing the inherent tradeoff with durability. Or they want thinner, lighter styles at the very edge of what a 50/50 polyester blend can hold together.