मन्त्रसाध्यत्वात्तनुक्षयः ॥ कZ_०९.४.१७ ॥
mantrasādhyatvāt tanukṣayaḥ
Because it can be achieved through counsel/strategy (mantra), the wastage (attrition) is slight.
Prefer solutions solvable by planning, negotiation, and intelligence rather than costly confrontation, because they conserve manpower and resources.