Many people are fascinated by the lives of people who aren't them - such as celebrities and historical figures. There's also a lot of people who dig deep into their family tree to sate their curiosity. If we're to assume that adventurers are thirsty for adventure and knowledge then the aversion to finding out more about the past makes very little sense.

There's plenty of aspects of the story that I don't care about, though if they're fleshed out for those who enjoy them? Great. I just hope that the stuff I do care about is, in turn, fleshed out further as well.