“We looked at the Universe, and saw that - in fact - the distribution is not uniform/homogeneous. The “Cosmological Principle” has been modified/replaced with the obvious notion that _perfect_ uniformity isn’t, and that tiny perturbations in the beginning were sensibly magnified into vast structures.”
Oh really? Got any citations that the Cosmological principle was “modified/replaced”? That would be pretty stunning if true, because, especially after Einstein, a whole lot of cosmology hinges on this very principle.
Look up “spacetime foam” for starters.