This is not correct, camera manufacturers and filmakers engineer _aesthetically pleasing_ noise (randomized grains appear smoother to the human eye than clean uniform pixels). The rest is still as silly as it sounds.
But yes, there are definitely also many DPs that like their grain baked-in and camera companies that design cameras for that kind of use.
It is only an issue in content delivery.
Does this explain why i dislike 4K content on a 4K TV? Where some series and movies look too realistic, what in turn gives me a amateur film feeling (like somebody made a movie with a smartphone).
https://en.wikipedia.org/wiki/Soap_opera_effect
Which is generally associated with excess denoisong rather than with excess grain.
This comment that I replied to is almost a textbook description of the soap opera effect.
The interpolation adds more FPS, which is traditionally a marker of film vs TV production.