For me I get that the story pushes the idea that suffering and hardship are just the necessities of life and that what makes life worth living is ultimately just being alive so you can experience both the sorrow and the joy in existence no matter how fleeting or pointless it may be, however it kind of ruins that same narrative by the way of literally every scion being so wealthy and powerful that even Gods are no match for them. Like, the biggest villain in Endwalker is a nihilistic immortal bird hive-mind that came to the conclusion that living in any form is suffering because life has no meaning and only true death is salvation, the second biggest is a genocidal sociopath so starved for any kind of joy in life that the only thing worth living for is the euphoric rush of clashing against a foe that can stand against his ungodly soul power, one of them is pretty bland and boring and it's kind of obvious which one.

More to the point there is the sense that a true utopia is in itself a kind of hellish existence because nothing bad ever happens so even joy and happiness lose all meaning, which I have to say is pretty stupid, your brain literally doesn't care if it's constantly being pumped with feel good juices, in fact it's actually really addicting and so the brain is almost hardwired to find joy from just the sheer experience of good feelings. Starving orphans freezing to death in the snow aside the contrast doesn't really give you anything and rather we argue that it does because the alternative is facing the grim reality that we live in an imperfect world and that life is quite literally meaningless in the grand scheme of existence as even that is fleeting and will one day end in a bleak frozen black void of nothingness regardless of anything we achieve. Salt may enhance sweetness and suffering might make mundane pleasures feel amazing in contrast but it's not like we actually need to experience suffering for our brain to pump feel good juices, it'll just do that, you could lay on the grass staring at birds all day and probably feel totally fine regardless of if you saw a homeless man bite off his frostbitten fingertips because he can't afford to go to a hospital. Every living human being could realistically be provided with a safe comfortable space to live with lab-grown robot-tended food to eat and given a base living wage regardless of career and I can almost literally guarantee you it won't make people suicidal because they don't have to struggle, it might utterly destroy our current societal standards and lead to eventual declines in birth rates and social interactions but that's not the same thing.

So while the narrative is comforting it's not really true, but that's the fantasy we all buy into to justify why we have to experience undue suffering.