The concept of a "Business Layer" is rather illusory. It is predominantly reliant on the technological capabilities available at the time of its birth. Contemporary database engines offer significantly more advanced tools than those available in the past. Contemporary game development has demonstrated that object-driven models are inferior, while data-driven techniques are more beneficial. You require data that is easily accessible and modifiable, free from the constraints imposed by business layers. It is merely a question of time before these business layers become significant obstacles in your system, complicating scalability considerably. It is evident that data structuring is necessary; nevertheless, the business layers are no longer required.