It's definitely something that is different from person to person. I strongly prefer it disabled, but not because it looks terrible most of the time - I could get used to it if it looked exactly like it would look if it had been produced with that higher framerate. The issue arises whenever it breaks, for example by making the acceleration of visible motion unnatural. This happens fairly often, either through unrealistic acceleration, or by breaking the previously established visual language of the movie. That's where it breaks my immersion - but that's not the case for everybody, and it's absolutely legitimate to say that you prefer either, or don't care at all!
Maybe a good analogy to understand the "it's objectively wrong" perspective (even if I disagree) is AI upscaling, for example of historical photos. Just like autosmoothing it adds details in a mostly plausible way, and some people prefer it, but it adds fake detail (which understandably annoys purists), and sometimes it actually breaks and produces visual artifacts.
Maybe a good analogy to understand the "it's objectively wrong" perspective (even if I disagree) is AI upscaling, for example of historical photos. Just like autosmoothing it adds details in a mostly plausible way, and some people prefer it, but it adds fake detail (which understandably annoys purists), and sometimes it actually breaks and produces visual artifacts.