The individual self and the One Self are a whole. However, the whole does not disavow the individual self, for it is its very source.
Non duality means there is no real separation. So the individual self is not to be disparaged, maligned, and demoted, for it is an expression of the whole.
The Whole operates in a variety of expressions, and each species, each individual life form, is equally divine. Each individual expression is an expression whose origin is the whole. To dishonor the individual self is to dishonor the whole.
We are not meant to be abandoned to a feeling of isolation, as if we are alone in world. In fact, the feeling of isolation is so abhorrent, that we look for wholeness.
The oneness of life, as in the teaching of non duality, can be discovered. However, even when discovered, there is still a body present, that has individual needs. Needs and desires may or may not disappear with realization.
The experience of duality and non duality both come from the same Source. Whether one awakes in this lifetime or not, the same source is operational.
During a particularly lonely experience, I was looking out the window on a cold winter night. I began to watch a squirrel, sitting on a snow covered branch, eating alone. The loneliness, the singularity of that particular squirrel, became overpowering.
Noting, that no one in this world cared whether the squirrel lived or died, or ever would ever care, my loneliness merged with the aloneness of squirrel. A feeling of oneness with the squirrel became real and overwhelming. Where was the separation in our experience?
The oneness, the unity in our apparent separate lives was palpable. It made no difference that we were of entirely separate species. The oneness was self evident.
One could wrap logic around this experience, and try to explain it. But truth is beyond logic, ineffable, and not provable, but it can be experienced. The experience of non duality, the subjective knowingness, is the confirmation.
So let us enjoy our individuality, even if it is not the ultimate truth. As the French say, "Vive la différence! "