What does the light-travel time reveal about the relative sizes of the star versus the entire Orion Nebula (M42)?

Light takes only a few seconds to cross a massive star (radius 1M Suns), but 24 years to cross M42

Comparing the time light takes to traverse a star versus its surrounding nebula provides the clearest illustration of the scale difference, even when dealing with gigantic stellar objects. In the context of the Orion Nebula (M42), which is 24 light-years across, the light transit time for the entire cloud is 24 years. Conversely, if one considers a star within that nebula whose radius is one million times that of the Sun, the light crossing that star takes only a matter of seconds. This comparison decisively shows that the star, despite its own enormous size, remains an infinitesimally small point relative to the colossal volume occupied by the nebula that birthed it.