My standard was not, as you quoted, “…convenience of one person sometimes ought to override the value of the life of another…” My standard was that convenience ought NEVER to override the value of the life of another.
The fact that you can make such a blatant error makes me wonder if you are paying close attention to what you write.
Actually, you haven’t shown that “all cannibalism is wrong.” In fact the soccer team eating one of their dead being morally permissible is a prima facie reason for thinking cannibalism is morally permissible, if cannibalism simply means “eating human flesh.”
If it does simply mean that - and you are the one separating the act of killing from the act of eating - then your conclusion has to be that the killing is wrong, but the eating is not. A cannibal who eats the flesh of another human is not doing anything more wrong by eating human flesh because, according to you, the wrong came about in the killing, not the eating. The eating is permissible as shown by the soccer team case, the eating would only be wrong if it was preceded by the killing.
If you want to insist that the act of cannibalism, per se, is wrong but permitted to the soccer team, then you need to show why cannibalism itself should be considered wrong, but the circumstances mitigated the culpability of the soccer team. By separating the two acts and offloading the moral wrong onto “killing” then you have taken on the burden of proving that cannibalism by its own nature is wrong.
You haven’t done that!
You need to get your implications in order before you contrive a conclusion, Roscoe.