Yeah this backdoor stuff do not worry me right now in the current political / geopolitical environment, but if missiles start to fly then i would personally cut any and all fiber optic cables that go any country involved, possible take my country off the grid so to say to not get caught in the digital crossfire.
Not least since i feel my country is pretty inept and gullible when it come to just about anything digital, so this actually worry me a lot more than it should.
Even if i personally made my CCTV cameras i would not aim them at any place where i am regularly, so i would not mind a camera aimed at my garden, where you could then see me mow the lawn now and then or other stuff like that.
But aim a camera at the inside of my house, that is only going to happen on a system that is not able to be accessed from the internet, and mind you i would prefer if my house was a big Faraday cage where WiFi signals could not get in or out.
So i would have no cellphone coverage in my house,,,, at least not my dream house i would design myself, but i am not putting tin foil on all walls and sealing + floors of my apartment,,,, i am not that paranoid.