You don't get his point at all.
We're easily within the top 5 of all time as far as historical results, trophies won, domestic + continental. The only club that one could reasonably say is a cut above us when looking at all aspects of history, is Real Madrid.
Combining domestic dominance and continental success we're easily on par with all the other clubs vying for that second spot... Barca, Bayern, Milan, Liverpool, and perhaps ManU.
So for Juve fans to be arguing in here that clubs like Bayern and Milan are bigger exclusively because they've won more CL finals, that is incomprehensible and stupid.