They are distortions or deformations of Anthakaranam. All these schools of Sadhana help the Yogi to remove that and there ends their purpose. Then Brahmam shines as the Sun, when the clouds drift away.

3.32.28

Now a beautiful question arises, “if every thing is Brahmam, why should one discard Asakthy? The object and the mind that desires it are the same Brahmam. Then won’t the effort to stop Vishayasakthi will be fruitless?”.

The answer is very simple. The mental activities that outgo through the senses like eyes, can not know the innermost Truth in your Self as the only ONE. Mind sees diversity, not Oneness. It can not understand that the objects, their components as Pancha bhoothas and the senses are ONE. Thus you feel that Devas, humans, animals, birds are all different from one another. You feel “I”ness and “My”ness in them. This causes bondage to the Jeeva. So it is most essential for the seeker to remove this “Bheda Bhavam”.