Good for Aronson! Especially the part about different people's liking different types of story. But I don't think "heart" is entirely subjective; rather, some people need less of it, and some, more.
I get bored by a story that's full of action and excitement, with a main character who is essentially untouched by all of it, like James Bond. A story with heart would have him learn about himself and others, force himself to do things he hates, find out what and who he loves, etc. That's not the only kind of good story, but it's the kind that keeps me reading.