According to Osho, not even self-realization is life's purpose; life is purposeless. The compulsion to have a goal—even 'self-realization'—keeps you in desire, means-ends thinking, and the imagined future. All is already here: this very body, the Buddha. Drop goal-orientation and identity from past/future; rest in the present, where the ego dissolves and suchness is realized without striving.
Life doesn’t need a goal—not even “self-realization”; just be fully here-now, and what you seek is already present.