What does a smart TV have to do with a private 5G network? People just upvote any meaningless comment on this site as long as it sounds mildly controversial.
The idea is to make sure they can keep that data flowing even if someone intentionally disconnects the TV from the internet
Given that there's an extremely simple and straightforward answer to your question (smart TV manufacturers sell data obtained from spying on users, and they need a way to get that data from the TV to their servers), I would encourage you to give some thought before making such an empty and vapid comment about voting habits on HN.