What concept in galactic habitation is profoundly impacted if Solar System formation timing depends on a shock from the Sgr Dwarf?

The idea that the timing of galactic mergers may be as critical to habitability as the location itself.

The theory fundamentally shifts the perspective on long-term galactic habitability. Traditionally, habitability zones are defined spatially—too close to the core risks radiation and disruption from Sgr A*; too far out risks insufficient heavy elements. If the Sun's formation required a specific, violent external shock—a 'kickstart' provided by the Sgr Dwarf's gravitational wave—it suggests that the chronological sequence of cosmic events, specifically galactic mergers and interactions, is just as crucial as the star system’s static position. A region might look stable, but it may require a transient, violent event to initiate the necessary collapse for a star and planets to begin forming.