Interferometer-based measurements of the wavelength of light do not detect Doppler shift. This means that they do not confirm hypothesis that the speed of light in a vacuum is always the same.
The quantum phenomena of light can be explained without photons, on the basis of electromagnetic waves.
Any description of the origin of the universe is a hypothesis, not an empirical science. But we can look for such a hypothesis about the origin of the universe, which is consistent with school knowledge of physics.
The high density of ions and electrons creates an electromagnetic vortex in the form of lightning. A similarly varied air pressure creates a tornado.
A large part of physics is based on the speed of light from a moving light source. Consequently, the speed of light from a moving light source should be unambiguously measured.