M404T1N I saw your review. Here are some points:
-In the far future we are not talking about simple succubi. You took that conclusion by yourself. We are talking about a legion of the seven deadly sins that can envelop an entire world under their draining ability, leaving nothing but a wasteland. Therefore, the desperation of humanity to keep them out of the world.
-Succubi also evolved with time. They developed new magic, new golems, new relics, etc. You are presupposing that they were the same as in the bronze age. They are not. Force fields, for example. While humanity have powerful armor, they have developed force fields by that point, where some times, physical attacks are necessary.
-Who said that the DNA recognition was created by humans? You are presupposing again without even playing the game. It's like me going to mass effect and writing a lot of things why the reapers don't make any sense with only playing the first game. Not only is ignorant, but also unfair.
-Who said that by the future you won't have a way of killing the succubi? Is that way common knowledge? And if not, wouldn't be a nice adventure to get that information for humanity?
-You can't keep succubi in prison. Again showing your ignorance about the lore. Once they "die" from hunger, they dematerialize and go back to hell.
-Yes, curses exist. But magic in SC is extremely expensive. You must have a powerful relic that will demand a LOT of mana to curse a single being. They can't be mass used. And that's not the path humanity will take. Their path is toward technology.
TL;DR: Your "review" is nothing more then speculation and ignorance. You don't know the basics of the lore and presupposes everything like you did know.