It is not that Vipras do not know what is their svadharma . There are many dharma SAstras to explain this. Also there are a few role models.
Most of the Vipras are entangled in the Web of the pressures and pulls of modern living. The moot point is how to balance the karmAnushtANas and the Spiritual pursuits along with the struggle for earning livelihood and maintaining relationship harmony.