Additionally, the densities of our vessels, especially the larger ones, are incredibly low. A stripped down Anaconda isn't terribly far off a ridgid airship in overall density...it would blow away in a gentle breeze on Earth and if we get atmospheric landing, will probably melt itself from overworking it's thrusters trying to counter the boyancy of even modestly thick atmosphere, especially at more mild gravity levels. Also, despite complaints regarding cargo volume, there is no ship in the game that couldn't credibly contain a volume in canisters far in excess of the cargo mass it's actually capable of carrying.
You could make a plausible, ~1600 metric ton anaconda, that could fit everything it needed to fit, including a fairly spacious bridge, if you took the current ship and reduced all it's linear dimensions by half of more (an eight-fold or greater reduction in volume).
Compare that carrier to the Anaconda. That carrier is ~100k metric tons, has a crew complement of over six thousand, and a potential cargo capacity (difference between light and full loads) of thirty thousand tons.