Who cares if they wanna debate it. It's something that happened a thousand years ago. If it were flipped, I'm sure people would be up to debating it. In either case what we find out about people a thousand years ago is neat, but does not affect the dead.

If this were about dinosaurs, I'm pretty sure we'd all be okay with reexamining the interpretations, so why care here?

If we learn something great. At least DNA is still considered useful in determining gender, which in some areas of academia seems up for debate.