What else is the Gita all about. Of course plenty of Yogis such as lineage of Janak, Sri Krishna, Arjuna and Sri Aurobindo himself found the Self, realised Sacchidananda and all else through the path of Works and have advised the same to others too. Both Sri Aurobindo and The Mother gave work to the sadhaks as the primary means of progress.
Affectionately,
Alok Da