We have proof they have no moral qualms or other guardrails, and they have incentive. We also have a decent idea how much it costs to connect to ambient WiFi or cell/5gnetworks. It’s a matter of time, which may or may not be already in the past.
I think it’s not worth it to them as long as 99.9% of the users hook up the TV to their home WiFi. Connecting to other networks without user confirmation probably opens a can of worms in many countries.