Earlier quoted context omitted.
What’s stopping you from disconnecting it from wifi mow?
This is also my question, but I suppose the answer could be that we don't trust LG to actually forget the wifi password (and not use it surreptitiously later). You could also change the wifi info, but that might mean changing a whole lot of devices (including wife's and kids).
I don't mean to be rude but it sounds like you just don't want to confront the rest of your household about taking the TV offline and are coming up with excuses to tell yourself this is actually fine.