Reducing population doesn't reduce suffering, because the longer overall life is preserved, the more suffering that will happen. Suffering and life are one in the same really, which is why stuff like tumors (which are alive themselves) form especially on hosts that have degraded dna from aging, and sometimes not even just older hosts. Technically, the young today are older than the young from years ago, material wise.
Imagine every second of life can be thought of as factoring into units of suffering. Some experiences cause greater increases in these units of suffering but to be born is always to acquire units of suffering. As a whole civilisation is composed and traded upon with these units of suffering. Take the grains out of a beach, is it still at beach when it reaches a certain number of grains of sand. At what point does it cease to be a beach? How many grains of sand do you have to take out of the beach before it is something else and not a beach? How many units of suffering do you have to remove from life before life isn't suffering?
All language is is just death. just various ways of talking about dying. Managing some things. We arent more advanced than the ancient languages just rawly speaking about hey deer over there 6 pm every night full moon this hour some random guy shows up over there and gives us fruit. Same shit now as it was then. Pointless war consumption strife order into disorder into order, hunt, be hunted, fuck eat die shit. its all the same for all time.