That being said, I have an old LG Tv (pre-android, forget what they call the os), and I never connected it, opting instead to hook up a firetv stick .... (who knows what bad crap they might be up to btw).
But the point is, we are a minority, most people go the path of least resistance.
I cancel those services... but I recognize that many people go the other way.
There are a few large IoT-focused networks like Amazon Sidewalk where conceivably the smart TV could connect to them if you don't connect it to your home wifi. I believe many ISPs like Xfinity also runs shared public wifi from their routers - a tv could connect via your neighbor's ISP-provided router and you wouldn't have any idea.
2. Convenience
3. Cheaper than buying an Apple TV et al
Convenience over all else is what 99% of people are doing.