To the best of my knowledge, so does every other TV OS. So, we need an option that doesn't. If an open option is available, it can be stripped of the capabilities you mention.
What we need is for TVs to go back to just being dumb panels, let me plug in whatever I want, and stay out of my way, no OS, just some little firmware overlay for a handful of settings.
This is unlikely, as consumers have little control hardware manufacturing, so the best we can do is ensure that free software can run on the hardware mass produced. Perhaps there is room for the EU to regulate?
"We must take the world as it is and not as we would like it to be." - Maurice Allais
Nice quote, would be relevant if we actually had any power over any of this.
But if they decide to lock these devices down, there’s little that can be done given that those that would be willing to put in the work to break it open aren’t likely to do it since there are a billion and one types of devices in this hardware space—the chance of yours being gifted with a working hack of such is ridiculously small.