This would not be without precedent. Some Samsung TVs already refuse to exit setup mode if they can't connect to the Internet after initial power-on to geo-lookup their IP to make sure that they're being used in the country they're sold for.

The best solution for streaming is a low-end PC with hardware video decoding and the ability to run Ublock Origin.

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Edit: I see from other comments that Samsung TVs already go into degraded functionality mode if they can't connect to their ad servers, and already serve some ads from endpoints used for necessary functionality.

However recently I wanted to setup my home automation system to automatically turn the TV off when I go to bed or outside, and for that I needed to connect it to the home network.

I solved this by confguring the router firewall to drop any package from the TV to the internet. It works!

Integration brings unneeded obsolescence and reduces choice and control. May be hard to avoid in space constrained phones but should not be needed on tvs.