Quantum mechanics is not metaphysics but rather a fundamental theory in physics. It is a well-established and extensively tested framework that describes the behavior of particles at the microscopic scale, such as atoms and subatomic particles.
Quantum mechanics provides a set of mathematical rules and principles that govern the behavior of these particles and their interactions. It incorporates probabilistic concepts, wave-particle duality, superposition, and the measurement problem, among other aspects. These principles have been experimentally validated and have led to a wide range of technological applications, such as lasers, transistors, and quantum computing.
While quantum mechanics does involve certain philosophical and interpretational questions, it is not merely a prescription for constructing physical theories. It is a specific theory with well-defined mathematical formalism and predictive power. Quantum mechanics provides a framework to understand and calculate observable quantities and phenomena in the quantum realm.
It is worth noting that different interpretations of quantum mechanics exist, each proposing different ways to understand and interpret the theory's underlying concepts and mathematical formalism. These interpretations address questions regarding the nature of reality, the role of observers, the collapse of the wavefunction, and other philosophical aspects. However, the core principles and mathematical machinery of quantum mechanics remain consistent across various interpretations.
In summary, while quantum mechanics may raise philosophical questions, it is a concrete and successful physical theory that provides a framework for understanding and predicting the behavior of particles at the microscopic scale.