1. All TVs in the last years are all "Smart" in a way. They do not have to be equipped with AndroidTV or any known OSs. Even my 8 years old Sony can already go to youtube.
2. If you need certain smart functions and your TV does not have it? don't be afraid just buy nVidia Shield, RokuTV box, AppleTV, etc. there are plenty of options. I actually prefer nVidia Shield for now.
Actually, I even looked for stupid TVs but with very good image quality. Unfortunately, there is none.
I seem to be unable to find dumb or stupid 55", 4k, HDR, 100Hz (or higher) panel, QLed/VA+full-array local dimming TVs.