That's different than what GP said though - that you need to reject the agreement to get it to be a dumb TV. Which is it?
Is the same thing. The agreement is giving it Wi-Fi access. If you say no, you deny Wi-Fi.
Later firmwares will still try to push you to the smart tv display if there is no signal for 5 seconds to get you to setup the wifi.
They'll probably install cellular connectivity or brick the devices if they can't connect.
This is why I purchase Vizio instead of other brands. I don't need my television loaded with a ton of apps I'll never use.