It's data, that's all that's needed. That you or I can't think of a reason or use case (well, outside of authoritarian nation state business that is) that makes it valuable just means we aren't likely ghoulish enough.

But you can't change your genetic data, so it's a bundle of "anonymous" data that will forever remain just waiting for the right link to irreparably link it to someone.

Cheap data point now, but who knows how useful or valuable it could be if the cyberpunk Dystopia of Tech Bro Billionaire's wet dreams come to pass?