Also. some of us where actually born in the same enviorment, education etc as these lot but rised up to this nonsense with what you call common sense and here we are posting in this forum in one of our many nice shiny tech mobile phone or computer
You clearly did not grasp the concept, if you did you would realise you would
BE that person. There are many factors not just environment and education, your genetics and intellect, and experiences also play a role. Keep contemplating.
You seem to think "common sense" is a inherited reality, like the universe has created some log and journal of what it says is common sense or not. Reality is a playground anything is possible is just really knowing the recipe (or as we like to call inventions, technology and science). Mobile and wireless devices would have been impossible 500 years ago, people would have laughed their socks off at you even mentioning the idea.
Common sense is mind-created, and "groupthink" if you were born into a tribe and grew up with cannibalism, then
cannibalism would be "common-sense".
Reality has no qualms about one animal killing another, not even humans do, we call it nature, reality also has no qualms about one human being killing another human being, (it's exactly the same as any other animal).
The problem arises in the human thinking mind, the ego "oh no this wrong! because my mind tells me so, it's injustice, reality shouldn't be like this! REALITY SHOULD BE LIKE WHAT MY EGO TELLS ME IT SHOULD BE!"
Hah! Reality doesn't adjust to you, you adjust to reality. That's why acceptance is a usually a powerful tool to overcome grief, such as a lost one.
You would understand reality truly if an atomic bomb was falling over your head right now where you had no say whatsoever about your demise, just a complete and utter defeat, you would either humble yourself in your fate or die screaming.
You know this already, if it was wrong reality wouldn't let it happen, but it does, Reality is like God, and it is letting everything happen for the sake of infinity, reality wouldn't work if there was no bad (for contrast) or if everyone was immortal.
The same way you have no qualms about watching a horror movie with monster's ripping people's heads off, or a movie with rape in it or any other negative stuff, in fact most people like it, that's why they create movies like this, for "entertainment" lol they like these horrible things as long as there is a safety net, the screen between them and the horrible experience.
Some of the best video/popular video games, are violence, such as FPS people shooting each other, Fortnite, GTA, etc. let's face it, humans love killing each other as long as there is no consequences.
The more conscious you are the more reality would feel like a movie, and you will be humble in death, the more egoistical you are, the more you will think you are the body and that death is the most horrible thing ever.
You guy's really need to do metaphysics and philosophy. The common thought of the average person is what is letting civilisation down right now we need people to start advancing as a whole. Deep thoughts, counter balanced with no thought (meditation) is way better than "common sense", Common sense is delusion, one man's common sense is utter madness to another man, because ultimately common sense is actually just a perspective with a fool who thinks it's "truth".