它们存在的逻辑和潜台词是———网球这么难，知道你们学不会，也知道你们不舍得买贵的，搞个便宜货糊弄你们，你们玩儿两次，就不会再打了，这样这个拍子便宜，你也不心疼。
The logic and subtext of their existence is that tennis is so difficult, we know you can’t learn to play it, and we know you're not willing to buy expensive ones, so we make a cheap one to fool you; you won't play it again after using it once or twice; since the racket is cheap, you don't feel it's a waste.