That isn’t going to work for long, your neighbor’s Alexa is now automatically sharing his internet with you, it’s just a matter of your TV manufacturer striking a deal with amazon for access to their mesh network.
The damages are largely theoretical at this point. Most of the time the compromised devices just join a botnet and don't directly steal much from the owners because they don't have access to much. For the privacy concerns it's also largely theoretical at the moment because to our knowledge (at least mine) the government hasn't used SmertTVs to do spying (yet).