Of course it's relative, and we're talking about a hypothetical situation here. Neither choice is "okay", one has the potential (however little) to cure the virus plaguing humanity, and the other saves a child. In my opinion, one is the right choice to make and the other is the wrong choice, and I would gladly make the wrong choice, as would you. If you disagree that's fine, but in this situation there is still the big decision being made.
Cancer is a huge problem on this planet. It's a plague. I hate it. For every person it kills (or nearly kills) it ruins the lives of 10+ other people connected to them. Children die because of cancer. I hate cancer.
I have young children in my family that I care about very much. If you told me I could trade one of their lives for a cure for cancer, I'd say absolutely not. Never. No hesitation. And I wouldn't lose any sleep over it. The same people who called Joel a selfish monster probably would also call me a selfish monster, but I see myself as neither. Some things in life are just simple. I am incapable of making that decision, so it's simple. Asking me to end the life of a child I care about is the same as asking a table to be an airplane. Asking a table to fly a group of passengers to safety would result in no such thing happening, and the table would have no moral responsibility for it. Because it can't do that. It's just a table.
I have young children in my family that I care about very much. If you told me I could trade one of their lives for a cure for cancer, I'd say absolutely not. Never. No hesitation. And I wouldn't lose any sleep over it. The same people who called Joel a selfish monster probably would also call me a selfish monster, but I see myself as neither. Some things in life are just simple. I am incapable of making that decision, so it's simple. Asking me to end the life of a child I care about is the same as asking a table to be an airplane. Asking a table to fly a group of passengers to safety would result in no such thing happening, and the table would have no moral responsibility for it. Because it can't do that. It's just a table.