According to this paper on the Cornell University website:
"The formation and evolution of galaxies can be explained only in terms of gravitation within a inflation+dark matter+dark energy scenario."
So, how legit is galaxy formation theories when:
Inflation Theory is in serious crisis
Dark Matter was invented to make the BB Theory feasible, but it has never been observed. There is not one shred of scientific evidence that it exists
Dark Energy was invented to make the hypothetical Inflationary Period work. However, no one has ever seen it either.
If the JWST doesn't find generation III stars (which also have never been seen, but are necessary to the BB model).... then the theory has failed to predict or explain hardly anything. What else is there to debunk?