The world is bad. What does that mean? It means first and foremost that we should do something to fix it. What does this knowledge do to us? Cause us pain, for the most part.
If the world is bad, in what ways can we react to such a revelation?
A. Strongly hold said situation in mind and think about it a lot.
B. Pretend it isn't so.
C. Any combination of the above two.
What are the advantages and disadvantages of each extreme, A and B?
A. Possible extreme mental pain, situational depression compared with the highest possible chance that something will be done to fix the world to a very slight extent
B. No mental pain, believing opposite leads to mental pleasure possibly compared with little to no chance of fixing the world to any extent.
Option A will not fix the world unless many believe in such a thing. Option A does not guarantee that one will realise how to fix the world - most for example, do not believe that having children is a problem even though it perpetuates more suffering. Option A is such an extreme that it will either make or break a person - you can get charitable fanatics, hellbent on saving the world, while at the same time you can get people who simply give up on the world, longing for death.
Option B will continue the suffering in the world, even if it is only one person believing such a thing, unless they are restricted by others believing either Option A or C. Option B may lead to the creation of suffering as it is believed that the world is fundamentally good - especially with relation to creating new human beings, or even the creation of new animals (for slaughter, say). Option B can create optimistic cheery people who can condone their own sins on the goodness of the world ("It's okay if I screw this poor person out of all their money, since the world is good they'll still be alive(which = good) after it").
What should Option C be to make sure the world is fixed yet people do not lose hope that fixing the world is possible? The combination should be at least, in my mind, one in which the world's situation is held in mind most the time so the most possible can be done to save it, but under that must be a steadfast delusion that it is not depressing to live in such a world. Not many people will be able to handle this form of Option C, the idealistic Option C. As an alternative I would suggest NOT thinking strongly about the world's state, BUT having mental blockers on to prevent belief that the world is good.
Will Option A (or an Option A-friendly Option C) work out if everyone reacts this way? The answer is yes, and comes in two forms: transhumanism and antinatalism. The easiest, most pain-sparing mechanism of attack is antinatalism, but the most realistic goal to be reached is transhumanism's pain-free utopian vision.
What will continued Option B (or Option B-friendly Option C) reactions do to us? Suffering will be glossed over, charities will not get the support they need, and increases in technology MAY NOT be used to eradicate suffering of humanity, but rather to increase the pleasure of the rich, while the poor suffer. The world being good can be used to justify all kinds of atrocities - for example, slavery. If the world is fundamentally good, then slaves cannot complain about their state because life is a gift no matter into what position you were born. Slavery can't be bad if it causes others to suffer, since suffering is not something to be concerned about and may even give valuable life experience. Slavery can't be bad because it violates human rights, because humans don't need rights as the world is fundamentally good and anyone is lucky to have any kind of life.