What makes you think the Apple TV isn't also spying on you? It almost certainly is collecting telemetry too. Whether that's more or less than LG I don't know, but my preference is a Linux box with Plasma Bigscreen.
What do you use when you switch between Netflix, AppleTV, etc? Some of those platforms won't even show you HD unless it's through HDCP compliant hardware and OS, which Linux isn't. That happened with the World Cup.
I don't watch Netflix or AppleTV. I believe you can simply use a Web browser, at the expensive of capped resolutions on some streaming services. VacuumTube is a drop-in replacement and improvement for the YouTube/Leanback app. If you require Android apps, Waydroid is an option. Overall, if you value privacy and user-control more than a frictionless experience, it's a great setup.