I'm saying without empathy you might see some cold data and ignore it. With empathy, you have a visceral understanding of the issue, and are motivated to go to the same cold data and make a rational choice for how to help. You're acting like you have to ignore rationality to feel empathy. They can coexist and compliment each other.

Psychopathy is characterized by a lack of empathy. They may be very good at making decisions that benefit themselves, but aren't likely to do things to increase others' well being at their own expense, even if it's a net positive.