I have a cheap samsung from 5 years ago that pops up a dialog when it boots. I've never read it or agreed to it. It goes away after about 5 seconds. After that I stream using HDMI and all is well. It's also never been connected to a network.

Can't say what other TVs do, but this one works fine without TOS etc. If there is some feature or other that doesn't work due to this, I can say I've never missed it.

As far as I can tell, I'm doing that right now with a new higher-end Samsung television. The installer showed me how to make it boot directly to the active HDMI source and skip the Samsung smart hub. The TV has never been online and I don't see any reason to change that — what possible improvement could a firmware update bring? I don't use any of the television's software-enabled features.