Step 1. Buy "smart" TV on sale
Step 2. Use the money saved to buy/build a streaming box of your own choosing
Step 3. Never ever connect the fucking TV to the internet
I've heard it will hop open networks to try to update. Doesn't sound that farfetched in 2024. If you're really concerned, you could disable the wireless adapter...
Not many people run open networks these days. I would be more worried about the things creating a mesh network to download ads from anyone who gave their TV internet access.
The local cable monopoly supplies modem/router/AP combos that broadcast unsecured WiFi hot spots. For "convenience" of its customers.
Pre-submission edit: there may be an authentication page upon connecting to verify that you're a legit customer. I've never tried it personally and have no intention on doing so.