I think different people have different levels of willingness to commit to these ideas. I think most people should think more critically about what career they pursue. I think some people should base their entire careers around doing the most good.
I think that, if you believe that suffering is bad for you, it’s not a stretch to think suffering is bad for others so you should seek to eliminate it as you would eliminate your own.
That’s why I argue that, if you’re unwilling to help any children if there’s an infinite amount of them, you should just act as though there is a limited number of children needing help. It doesn’t seem like there’s anything different about these cases that should suggest different behavior so you should just act as though it’s the first case if that’s what’s psychologically important to you.