On top of that, the TV manufacturers subsidize the cost of their own TVs by shoving as much adware as possible and having it pay for the cost of the hardware. "Smart" TVs will almost always be cheaper than equivalent dumb TVs because of this reason, which forces many consumers' hands. I don't think there's any way to avoid this other than regulation, which likely won't happen because the system moves too slow to keep up.
the solution to this it's to just never enable wifi on the tv and just use it with your box, I for example use a cheap android tv box and my regular computer. The same with kindle I don't buy books from amazon, and just use calibre.