You need a certain amount of hydrogen to create lift.
The size of the Hindenburg would be relative to the amount of hydrogen needed to create such a lift.
Therefore, the size of the Hindenburg isn't relative to how much it can lift. The amount of hydrogen is the only thing that is relative.
If you wanted to gain the same amount of lifting power in a smaller package, you would have to make the hydrogen denser which would turn it into a completely different element in and of itself which is why the statement in the post is funny and mine numbingly stupid.