[gjygj]

The word "huge" carefully avoid quantifying the amount of information.

Imagine a conversation with zero non-words information (a transcript).

Now one with zero words (mime game) .

Which one conveys more information?

[munificent]

If you're going to make a reductionist argument like this, then consider the byte size of a text transcript versus the byte size of an audio recording of the same speech act. The latter will be orders of magnitude larger. Thus it strictly contains much more information.

[shkkmo]

That depends on the conversations.

Sometimes you can say far more with a single look than you can with mere words.