But "a lot more" is not a bounded heuristic. A good communicator would use more words to defend and idea than to present it, but way less than a bad communicator.
Defending rambling texts on the basis of "ideas take more words to defend them" is defending the incorrect idea that quantity is a quality in itself. Some ideas are self evident, some ideas can be defended in short well laid out arguments.
Even if a idea is complicated and requires a relatively long explanation. If that is the smallest possible defense, it would still be succinct even if the text is long.
Defending rambling texts on the basis of "ideas take more words to defend them" is defending the incorrect idea that quantity is a quality in itself. Some ideas are self evident, some ideas can be defended in short well laid out arguments.
Even if a idea is complicated and requires a relatively long explanation. If that is the smallest possible defense, it would still be succinct even if the text is long.