I suspect that in cases people clearly recognize as altruistic, the rates are closer to Brian’s than to yours.
Which cases did you have in mind?
People generally don’t altruistically favor euthanasia for pets with temporarily painful but easily treatable injuries (where recovery could be followed with extended healthy life). People are not eager to campaign to stop the pain of childbirth at the expense of birth. They don’t consider a single instance of torture worse than many deaths depriving people of happy lives. They favor bringing into being the lives of children that will contain some pain.
Which cases did you have in mind?
People generally don’t altruistically favor euthanasia for pets with temporarily painful but easily treatable injuries (where recovery could be followed with extended healthy life). People are not eager to campaign to stop the pain of childbirth at the expense of birth. They don’t consider a single instance of torture worse than many deaths depriving people of happy lives. They favor bringing into being the lives of children that will contain some pain.