If I had to choose between:
1. I get badly tortured
2. Six billion people get badly tortured
I would always choose 2.
Consequentialism may say:
Choosing 1 results in least pain, as only one person gets tortured.
However, the problem is that the one person getting tortured would be me.
Option 2 hurts six billion people, but it doesnt hurt me.
I dont feel pain of other people. However, I feel my own pain.
So logically, the only morality I am interested in is reducing my own pain and increasing my own happiness.
I dont give a shit if any number of people suffer if the choice is me or them. I will always choose to save myself.
Think of it this way.
Example:
I will get tortured for all eternity. It will be really painful.
However, there is a button that I can press so that I stop my torture. However, six billion people will be tortured for all eternity instead of me, each same as I would have been tortured.
I would press the button.
This doesnt make me some monster. No, I would still feel bad that people are getting tortured. But at least its not me who gets tortured. Better them than me.