The text presents fasaha through freedom from defects. This works as a concise diagnostic description, but the accompanying commentary notes a conceptual subtlety: an existing word possesses qualities, whereas freedom from a defect is phrased negatively.
Saying “this word is free from harsh combinations” makes a testable claim. It does not imply that a word's positive communicative qualities have ceased to matter.
For practical analysis, check whether a specific defect is present. The conceptual debate about a negative definition should not be confused with the actual phonetic and linguistic tests.