First, just the evergrowing tracking of everything, it's just unwholesome in general.

Second, why assume a random Chinese tech company will manage to keep this information to themselves? I wouldn't exactly bet against some terabytes of videos appear on some torrent indexer. Now, combine with modern AI tools for sifting for what you are interested in, and it might hit closer to home for someone.

Assuming an efficient market it'll eventually be sold to a local burglar. Also, I imagine ICE might be interested in a list of homes where something besides English was spoken. Also there are those email scams that claim to have video of you doing something embarrassing, but usually don't. Given the trajectory of AI, their claims might start being true.

An employee of that company sells footage of you to a scam center. They then blackmail you.