I only need 1 example. and your 'counter examples' wouldn't qualify as such. Because we only have one (inflating) universe. But let's be somewhat practical and use the inflating balloon example. You may notice immediately why it's not actually a good example when talking about the universe.The balloon is a solid filled with a gaseous substance. It expands because the gaseous substance is forcibly expanded. The only connection with the universe would be 'forcible expansion'.That's where the comparison ends. There is nothing like the universe in the universe. We do not know if this expansion will go on indefinitely or that it, at some point, may contract again. We simply just do not know. That also is science. Theorising about other universes or extra dimensions will not expand our knowledge about the universe. Although it may give someone an idea by way of thought experiment. (Let's call it an Einstein moment.) But in the short term this direction is not likely to expand our knowledge of the universe. Possibly we might be better of going in the other direction: that of the infinitesimal small. Which, indeed, over the past decades, has advanced our knowledge of the universe.