What if ghouls was real ?

I think I also read this question in the Knowledge Trunk. So I will try to answer it. First putting a context. In Africa homo sapiens is born, while in the Middle East homo thireftís is born, similar to homo sapiens, but with an extra organ that generates a tail, or a liquid muscle that can be removed. For some reason homo thireftís can only consume water, coffee, homo sapiens and other homo thireftís. coming to face groups of homo sapiens. Homo thireft have a human-like mind, so they enslave homo sapiens, like laborers and cattle, they are not deaf. And as we homo sapants, they spread throughout the world, now, I'm not sure of this, but it occurs to me, that o A, species like chickens, cows, dogs, and other animals without domesticated problems because like them they do not consume them they would not need it or B if they would tame them, to feed them to the sapient. they would escape, and no, it is not like facing a group of humans, because we see, In Tokyo ghoul we see that knives cannot harm them and I honestly do not know if normal bullets can harm ghoul, but how we see that facing them is used lamps and things made of steel lamps or even firearms before that. Existing since the stone age we could not have a chance, or perhaps, Judging by the date, A group of humans would cross the bristle star and arrive in America. While the ghoul or homo thireftís do not need tools to make, they would have no advances, and humans to the north who have not yet had contact would be forced to develop weapons such as spears, arrows to hunt their own food, until they come across the homo thireftís. Who after conquering them would absorb their culture and inventions, I do not know if they would have a religion or something similar, but the discovery of America is something impossible that will not come. Honestly, I think that we, the homo sapient, could have a life similar to that of slaves of the Columbian age and ghoul, one similar to that of Europeans at that time. Only without any chance of killing them. Although, with masters who have affection for their pets, and with over-exploited resources because once they have their needs they will go for more. In fact, those are one of the things with which I disagree most with the origin of the CCG in the Tokyo ghoul manga, since, according to the manga, the ccg was formed by the ghoul themselves to control themselves. and the first lamp was created with a kahou that one of the founder donated. After considering this review, it has made me wonder why the heck does the world of Tokyo ghoul look like ours? Thank you