I agreed with this until I came to this: “But he also understood that celestial mechanics was fundamentally influenced by electromagnetic drivers.”
Followed by
“Velikovsky was certainly not the first to propose a celestial cause but he was probably the first to nail electromagnetism as the essence of planetary dynamics and propose chaos in the cosmos as driven by this erratic fundamental.”
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I have not heard much about electromagnetism would be the driver of comet and meteor activity rather than gravity. It doesn’t seem unreasonable to think that disturbances in the Ort cloud caused by the galactic din — would rain down comets and meteors into the inner solar system from time to time.