P6: Black Holes as Central Gravitational Vortices Lacking Singularities: The Universal Centrality Rule

The standard interpretation of black holes as objects containing a central singularity of infinite density is a consequence of applying classical general relativity beyond its range of validity. This paper proposes an alternative interpretation grounded in the dynamics of the Kerr metric: black holes are gravitational vortices whose event horizons mark a relativistic causal boundary in the exterior geometry, without requiring any physically established central singularity. The event horizon is interpreted physically as a relativistic causal boundary of the exterior metric, while the familiar Newtonian escape-velocity analogy is retained only as a heuristic and not as a literal derivation of the horizon. The Kerr metric for rotating black holes naturally describes a vortex structure, with the ergosphere, frame-dragging, and ring structure all following from vortex dynamics. The formal singular structure at r = 0 in the Kerr solution is interpreted as a signal that the classical interior description has been extended beyond its physical domain, rather than as a directly established infinite-density physical object, consistent with the mathematical literature on the Kerr metric.Every directly confirmed observational feature of black hole candidates is shown to be consistent with the vortex interpretation: event horizons, accretion disks, relativistic jets, gravitational lensing, gravitational wave emission from mergers, and the black hole shadow images obtained by the Event Horizon Telescope. Flat or flattened galactic rotation-curve behaviour is shown to arise plausibly from the angular momentum distribution of galactic vortex structures in proof-of-concept N-body simulation, without hidden mass. The standard black hole information paradox is substantially weakened under the vortex interpretation because the central singularity is no longer treated as a physically established mechanism of information destruction.This paper further develops the Universal Centrality Rule: the observational fact that in the complete record spanning all surveys, all instruments, all redshifts, and all galaxy morphologies, no confirmed stable rotating galaxy has been observed with a supermassive mass concentration displaced beyond barycenter-consistent limits. The paper derives this zero-exception universality as a structural necessity of the gravitational vortex interpretation. The vortex interpretation explains what galactic black holes are; the centrality rule explains why they are always and only found at the dynamical centre of the systems that produce them.