Craving-clinging leads to volitional actions that can be used for duties. If I let go of craving, how would I do duties to family? If I let go of craving by doing Vipassana, then according to dependent origination, there would be no clinging. With no clinging, there would be no volitional actions - without these actions, how would I do duties to family members?
Craving is not required to help your family. You only need compassion(Karuna) and kindness(Metta). Craving only makes you worried and sad.