Wow what an irrefutable argument. I am placing this under religion.
This is a very common argument being associated to why God allows evil and not only good. Actually there are three moral categories a human may choose which is to be morally evil, morally good or morally neutral. Morally neutral acts are generally acts that do not devalue others nor can it be judged as an act for the greater good. For example, I choose eggs over waffles. I'd rather take my bike than a car considering I'm alone.
Choosing to read the Quran for now and the Bible later(Just kidding, no super religious person would consider that neutral)
My point here is there can be good without evil. You don't need to contrast good. Who cares about a perfect world where nobody sins, isn't that better than our current state? And most probably that perfect world would've achieved world peace and equity. But then how would you differentiate good from evil? If you say evil is necessary to contrast good, then what's necessary to contrast neutral things? Nothing. Since the two categories are out we are left with normal and neutral things and acts. Go argue you'll miss your mischief and lies then you're really just admitting you are addicted to doing evil acts despite being in a religion. It doesn't matter if only good exists and nobody knows or even has an inch of idea what evil is! God clearly missed this logic and was like most of you believing in 'balance'. I'm not gonna wait for a time 50% of the world is good 50% of the world is evil or even perhaps the percentages change at alternating times because no one, NO ONE can be morally upright for a long time. You can only believe that your sins are so small compared to the good you'r doing and reach an insane thought that your small sins are nothing. Bad words, insults, perversion backstabbing. Even if we take it back to the caveman, where they had no option to burn or club one another, they'd focus on only finding food and shelter for one another. Love would've been firmly, strongly and clearly established in earlier times for younger generations to be forced to learn.
Nobody will know what rape is but they'll be forced to know respect for women. Nobody will know how to murder but they'll focus on valuing life. They become HABITS. Something most religious people can't forge with goodness. Good acts will become HABITS and not some FORCED ACT so you don't go to hell. Since God knows everything, I don't even have to specify which evils to take away because God already knows all forms of evil and once taken out of existence only upright morality and neutrality will govern. True love will finally be everywhere.
Wait a minute...what if God already did take away everything he considered forms of evil?...And he left us with...morally upright options and choices meaning...we're the ones judging what is morally upright and evil...we're not going according to his will...
If that were true then still I stand judging God rather than God judging me.