Earlier quoted context omitted.
Some functions of "smart" TVs are impossible to turn off, unfortunately. I personally don't like the FPS smoothing most modern TVs do, and for many there is no option to turn it off completely.
I’ve never personally seen a TV that can’t have the soap opera effect turned off, but I believe you they are out there. Apples to oranges feature though.
funny thing: i did not know the name of it and i couldn't not understand why "Avengers: Infinity Wars" was so upsetting to watch.
took me literally 20min of poking around to find out the option and turn it off (it's called "TruMotion").