Yup. Works great. All things equal I'd prefer just not buying a damn Smart TV to begin with, but absent that as a realistic option (every 4K TV I've ever seen is smart) I'll happily settle with them never seeing one byte of Internet.
The article lists several manufacturers of 4k dumb tv’s
I’m in the same camp. The next escalation is defending against a TV scanning for, and joining unprotected neighbor networks to “phone home.” It’s a thing.