This is the conventional thinking, but it ignores a huge factor - marketing. The major function of the gigantic advertising industry is to deceive consumers about the real qualities of a product, leaving price as the only only signal that they can detect through the noise, in most cases.

And advertising works in multiple ways to promote slop. Sometimes, it is directly by marketing bad products as cheap but high quality bargains. Sometimes it is, as I said, by using previous high quality products to sell low quality ones at the same prices. Sometimes it works by creating a huge pressure to consume more (such as the pressure on fashion trends), wiping out any care about durability (if it's considered poor taste to wear the same T-shirt two seasons in a row, why pwuld you buy a durable T-shirt?). Sometimes it works by mudding the waters, making consumers distrust any reviews that praise the quality of a product, leaving price and directly visible looks as the only signals that rational consumers can base their decision on.

So, overall, the blame for this state of affairs lies far more with the way the modern market was designed, than with consumers specifically.

Feel free to blame whoever you want.

It’s a dance between consumers and business. Sure some markets are heavily influenced by ads or simply what’s in fashion but ultimately it takes two to tango.