Waton, that is an interesting "just so" story to try and account for why spiral galaxies appear young.
SB, I was just commenting, adding to your conflating the "voice of god" with the science "hand of god".
Standing waves can be an acoustic phenomenon, shaking matter into distinct, targeted areas. google "Chladni plate". Every entity has a basic frequency resulting from its size, possibly affecting the structure. I believe that even our solar system has a basic frequency of 5 minutes, with a wavelength of .3 AU. or think of
the ~28 day cycle of the rotation of the sun, the orbit of the moon and our reproductive cycle.The earth rotates in a cosmic standing wave of fertility, ha ha.anyway,
the oldest stars are in global star clusters, or elliptical galaxies, that have no organized rotation, but must have correctly orbiting individual, perhaps dead suns, that have given up on colliding.
There was a curtain, shroud, as the size and with it the "Eigenschwingung" of the cosmos changed during the early stages of the Big Beginning event . ALMA is already peering deeper, Webb might see details at the fringes. in the meantime,
it is good to hear the hum, see the waves in the universe. , HMM. enJoy.