Because when there is birth, there will be death. Our excellent teachers discovered there is a sequence to life within cyclic existence: our body will disintegrate, the mind continuum will continue to move forward, and we will experience birth, death, existence, rebirth, death, existence... This cycle goes on infinitely.

If death is not resolved and the causes of the miserable realms are not eliminated, even if we are always in the happy realms, we will continue to experience great suffering like death, separation, and physical disintegration. Thus, from the perspective of infinite lives, doesn’t cyclic existence become a huge problem