Why Renormalization Is Proof That QFT Is Not a Fundamental Theory

Quantum field theory is widely regarded as the fundamental framework underlying modern particle physics, despite its reliance on renormalization. This paper argues that renormalization itself demonstrates that quantum field theory cannot be fundamental. By examining the conceptual role of divergences, infinite bare quantities, and scale-dependent parameters, it is shown that renormalization compensates for a lack of internal consistency rather than resolving it. As in the case of the quantum measurement problem, the theory achieves empirical success while remaining conceptually incomplete. The analysis emphasizes internal coherence and theoretical closure as necessary conditions for fundamentality. The conclusion is that renormalized quantum field theory, like non-interpreted quantum mechanics, should be understood as an effective framework whose predictive power does not imply foundational completeness.