This is irrelevant to what OP said which is that it this should be the default. One anecdote of "with effort and technical expertise I returned the appliance to a workable state" doesn't mean things are ok.
edit: Im not trying to be snarky, I think your reply was genuinely trying to be helpful, but its not ok that we're being sold this crap
I agree it should be the default, but this TV was readily placed into dumb mode at first powerup. Set your country & language, select dumb mode ("Basic TV"), skip WiFi and most would be satisfied with the result.
Some effort's needed to clean up the homescreen, but you never need to see it. Hand your grandparents a basic programmable remote without extras like the home button. They should be good to go.
edit: Im not trying to be snarky, I think your reply was genuinely trying to be helpful, but its not ok that we're being sold this crap