Something is very wrong with cosmology. Of course, I have no idea what that is. One possibility is that the baseline assumption that physical laws don’t change over time is just wrong.
The baseline is wrong.
And from the article: “The cosmos is organized in dense regions and voids,”
What you say is what I suspect also and the speed of light is not constant but has voids and older areas where spacetime is running differently to the outside observer.
“Something is very wrong with cosmology.”
Agreed—Physics is turning into a mess as well. The large scale equations and the small scale equations don’t match. Relativity and quantum mechanics don’t play well together.
The old saying may be correct—the more we know the more we learn we don’t know.