It means, the Aether is infinitely hot and dense particle matter by its definition. You can imagine it as a dense interior of black hole, filled just by gravitons, axions, neutrinos...

But just because of Aether infinite density, the speed of energy propagation through such dense environment is rather low - it corresponds the speed of light from the inner perspective. So that the number of particles and particle levels perceivable is always limited. And the fluctuations of limited amount of particles can be never fully chaotic completely - they exhibit a scale invariant density fluctuations, similar to multinomial distribution of repeating patterns inside of series of random number, comming from finite interval.

Therefore our ability to see something inside of our Universe simply follows from our inability to see everything at the same moment. I'm extrapolating this concept here and here, for example.