This place like a flat-earther gathering sometimes.
My opinion is this is just a consolidation of devices. I have many friends who live off their phone data plan giving hotspot to the TV and other devices. Now being moved into a common device format, the TV. I don't think they can spy any more effectively this way. Eexcept via the router integration that gives them way more access, but I'm sure this exists already as a wifi feature on tvs. Just technology trudging along. Perhaps they have a secret sim card or esim embedded, that might be a risk as the hardware is already there for a valid reason.
What we are lacking is implementation but the tech and probably the intent was always there. If HDMI ethernet connectivity(HEC) had gained traction, we would have seen a fire stick, apple tv or roku providing internet to your tv without asking for explicit consent.