If this is anything like an LG smart TV — and, as the UI is identical to my C4, I assume it is — none of the agreements are required to use the device as a monitor.
On LG TVs, at least, you can also completely disable the WebOS UI via a command sent through an onboard RS-232 interface, at which point the TV displays no overlays at all.
I think the solution to these kinds of issues is a coordinated campaign in small claims courts across the world.
If people decided to take the time to simultaneously take this issue before a judge who will give them a default judgment when a company like LG no-shows it'll start to hurt them and the publicity from this will force change.
When the EULA is blocking the content, the monitor isn't working as advertised. And they willingly shipped it like that.