1)No one can predict the future completely accurately.
2)So, all beings probably have a unique enough form.
3)Plus, the most fundamental essence of reality is unknown.
4)Thus, upon death, each being probably doesn't return.
5) https://www.researchgate.net/publication/377663987_Respectfully_and_Unfortunately_The_Improbability_of_and_Danger_in_Believing_in_Reincarnation