reasonably important, if you're never connecting your lg tv to any network, and just connecting it to an AppleTV or something and letting HDMI-CEC control it so you never even see their OS.
I would suggest a mini-PC running Linux and Plasma Bigscreen instead of an AppleTV if you want something 100% private and user-controlled.
Exactly this. And with an Apple TV 4K Ethernet, you've got a bonus Thread border router for smart home devices. I actually didn't even realize that initially, but was very pleased when I found IKEAs latest round of Matter over Thread devices paired nicely with it and my existing Home Assistant + Hue setup.