So you're saying that by spending resources on not creating the new lives, people are essentially choosing the "create a life with negative welfare" option, but instead of creating a new life with negative welfare, an equivalent amount is subtracted from their own welfare. Am I understanding you correctly?
Yes, that's what I was trying to say.
Joshua Greene manages to squeeze his ideas about 'point and shoot morality vs. manual mode morality' into just 10 minutes. For those unfamiliar, his work is a neuroscientific approach to recommending that we shut up and multiply.
Greene's 10-minute video lecture.