The same fact need not be phrased identically in every situation. A description of attack, battle, or overwhelming calamity can benefit from weighty diction, while consolation, care, and intimacy generally benefit from gentle diction.
Situation 1: Strong resolve and severe conflict call for vigorous expression.
Situation 2: Calm, closeness, and tenderness call for fluent, soft expression.
This is not an absolute ban on forceful words in lyric poetry; appropriateness depends on the local rhetorical purpose.