The good news is there is no good reason to plug the TV into the internet.
Trifecta: Piracy + Local media server + Streaming device, either Apple TV/Android TV (without internet access).
No loss of quality, devices that could spy on you, don't, and those that would spy on you, can't. The only trade-off is some convenience.
Apple TV, Android TV or other devices are perfectly capable and better integrate with mobile and other devices in your network.
The tradeoff consumers are sold is trading convenience of in device apps for security.
Smart home devices like TVs, and thermostats should be treated as default hostile and isolated on a guest wireless network instead of your main one.