>>122723>randos suddenly getting powers led to humanity's near extinction simply because they felt like itAnd it's not that humanity has been driven to extinction but that a supernatural force has driven evolution in humans and the resultant change has causes humans to force evolve humans who couldn't use cantus.
>The entire backstory is built on first-wave rando retardation on top of a thousand years of emperor retardation on top of scientist retardation all to deal with the absolutely irredeemable walking nukes that are cantus users.It's a pessimistic view but it's one of the answers to the question, "What if Superman was evil?" It's perfectly reasonable to think that if some disaffected teen got cantus power they'd go on some murderous power trip. Then once, the more psychopathic cantus users realized the extent of their power they'd institute some caste system with them ruling over masses of slaves.
The scientists plot is a little more far fetched but it's still reasonable to think there would be a group of people that wanted to restrict the influence of cantus society and did so by leveraging scientific insights to curtail the excesses of a spiritual awakening.
>blatantly sinister actions of their superiors in a way that almost seems to say "hey, maybe surveillance states are bad"I think the key insight you're missing is that cantus users are not mere humans. They are supernatural entities who with a mere thought can inflict an unthinkable amount of harm to the world around them. They are closer to gods than to humans and must be held to a higher standard, even if by force. This kinda goes back to the idea that in the face of unequivocal and great evil, any action is justified. Similar to an argument that the ends justifies the means. Importantly cantus users are not gods but still mortal and fallible.
>>122741>explicitly stating the system is undesirable and should be changed for the betterThe conclusion Saki reaches is only after she discovers that queerrats are humans. This is the crucial bit of information to understand the moral framework the story operates under. Cantus users are held to a higher standard, they have immense power and go through rigorous and deadly training to ensure they are of such a morally upright character to wield their powers. Despite all this training and moralizing they do, there is an original sin their society has committed and continues to perpetrate; the enslavement of and disregard for the humanity of queerrats. This one evil ultimately makes all the other small evils the society justifies (killing children, censoring knowledge, ect..), unjustifiable. Despite all the effort society has put into controlling cantus users, they still wantonly kill other humans as their whim suites and refuse the recognize the humanity of queerrats.
After Saki accepts that queerrats are humans she begins to atone for societies sins by saving Squeller from a figurative and literal Hell. This is not some large revolutionary act like Squealer did or one may expect from a story about overcoming a totalitarianism or any other "great evil" but it is a small act of defiance that demonstrates one person's ability to change the current society. More importantly, from a moral perspective, Saki has recognized the humanity in Squealer (by extension all queerrats) thus beginning the process of reconciliation.
Shinsekai Yori's story is closer to an allegory about the dangers of societal inequality and treating others as non-human than about totalitarianism.