All smart TVs are dumb if you perform one simple action. When the terms and conditions screen pops up during the TV setup process simply select "No." Congratulations, you have a dumb TV. This is what I do and so far it has worked.
1. It will be honored 2. It will not be changed to default during update
Do you check every setting on your phone/tv/pc after you boot it up? It seems very impractical to me.
As a user, I assume that unless I explicitly changed something, my setup remains the same. I used to be able to trust that manufacturers won't try anything too stupid, but at that time the cost in performance, gear and PR was sufficient and incentive to sell information on you was not as prevalent.