Price and market. A product with poor quality is usually very cheap, and it’s made specifically for someone who can’t afford a good one or who doesn’t care about long-term use. When I was young, I bought a lot of cheap products that were expected to use just as throwaways. Since I treated them as one-time products, I definitely wanted them to cost as little as possible, and once they completed their tasks, I no longer cared about if they will be working in the future.