The Fermi Bubbles tower 25,000 light-years above and below the Galactic Center with sharp edges and 10⁵⁵ to 10⁵⁶ erg of content, and they are conspicuously asymmetric: different extents, brightness, spectra, and edge structure north versus south, with a cocoon substructure only in the south. A symmetric engine in a symmetric halo should not build these; explanations multiply epicycles of precession, successive outbursts, and tuned density gradients.
The model treats the bubbles as engine plus environment, with both sides drawn symmetric by default: a central outburst into a smooth halo. Every observed asymmetry must then be purchased with an added parameter, and the engine history itself, jet or starburst, remains undecided after fifteen years of mapping.
SCT supplies asymmetry on both sides of the equation as the default, not the epicycle. The central black hole is a collision-seeded object whose accretion history is fed by debris streams with inherited directionality (P46, P31): seeded fueling arrives in discrete, oriented packages rather than smooth symmetric inflow, so outbursts are naturally episodic and axially skewed. And the halo the lobes expand into is not a smooth sphere but collision-deposited structure with density gradients set by the local deposition geometry (P34, P25): the two hemispheres of the Galactic halo differ because the debris field that built them was never mirror-symmetric.
The asymmetric bubbles are then the meeting of an asymmetric pulse train with an asymmetric medium, requiring no precession tuning. The framework adds a checkable alignment layer: the bubble axis and its skew should correlate with the local inherited angular momentum structure, the same J alignment readable in the satellite plane and the disk warp (P32, P48), since engine orientation and halo gradients descend from one deposition geometry. Energetics fit comfortably: seeded central black holes carry deeper accretion reservoirs than secular feeding provides.
This is the same seeded-engine, structured-environment reading behind the early SMBH demographics and the gas-DM offset family. There is no need to invoke per-feature epicycles for structures whose asymmetry was inherited.
The alignment layer is testable: if the bubble geometry, the disk warp, and the satellite-plane J prove mutually uncorrelated at high confidence, the one-deposition-geometry account loses its distinguishing content. At the engine level, a demonstration that a single symmetric outburst into a smooth halo with standard gradients reproduces the full north-south morphology, edges, spectra, and the cocoon, without tuned asymmetries would remove the need for inherited structure.