That’s what my in-laws did. “For some reason you hadn’t connected your smart TV to the internet; instead of using your Apple TV, we gave TCL your WiFi password. Aren’t you proud we figured it out on our own?”
If you're going to that sort of length, maybe just filter DNS requests from the TV to whitelist Netflix and Amazon Prime Video, etc. but block everything else. A custom router might go one step further and only whitelist outbound traffic to IP addresses that were previously resolved through DNS.
