depends on the world, but as I see it here currently, yes. maybe in a couple hundred years society will be unrecognisable und much more fair and hold much less suffering within it, but until then it depends on how confident I am we could get there. If i was promised the world would be largely unchanged for the rest of eternity I would push the button.
I think it would be pretty selfish to not push it just so some people come somewhat enjoy their life, while others are raped, tortured, imprisoned wrongly,starving,having some awful mental illness or physical illness. but maybe I just haven't found enough people that really loved their life to offset all of that.