Did automobiles replacing horses, diminishing horse population, diminishing horse suffering – as a consequence of work forced upon the animals. Is that moral win for horses; less suffering? Although their population is vastly smaller than 130 years ago.
Sum benefit of the world. For you today, you’re still here so I assume you prefer to exist. How bad would things have to be before you prefer not to exist? That is your personal value of existence. Now apply that concept to everyone on earth.
Thinking about others is not the same math. I would rather have fewer people and better quality of life if I was still here but that is not a fair assessment because every person feels that way and most of us still want to be here.