I have a Samsung "smart TV" and have no intention of ever letting it on my LAN. It does not get the wifi password and has no Ethernet cable. It's used as a dumb display hooked up to a home theatre receiver and Xbox one x, home theatre pc, etc.
I do the same. And the next step will be wrapping everything in alu foil, because it is cheap for companies to include gsm module. Only half kidding, unfortunately. :-/
Do not trust the software on these things.