If TV settings offend you, you should be offended by anyone watching anything made for movie theater on a TV or iPad or - gasp - a phone, regardless of settings. And it should be offensive to watch with the lights on or windows open. ;)
To be fair, 24p is crap. You know and agree with that, right? Horizontal pans in 24p are just completely unwatchable garbage, verticals aren’t that much better, action sequences in 24p suck, and I somehow didn’t fully realize this until a few years ago.
A lot of motion-smoothing TVs are indeed changing framerate constantly, they’re adaptive and it switches based on the content. I suspect this is one reason kids these days don’t get the soap-opera effect reaction to high framerate that old timers who grew up watching 24p movies and 60i TV do. They’re not used to 24p being the gold standard anymore, and they watch 60p all the time, so 60p doesn’t look weird to them like it does to us.
TVs with motion interpolation fix the horizontal pan problem, so they have at least one thing going for them. I’m serious. Sometimes the smoothing messes up the content or motion, it has real and awful downsides. I had to watch Game of Thrones with frame interp, and it troubled me and it ruins some shots, but on the whole it was a net positive because there were so many horiz pans that literally hurt my eyeballs in 24p.
Consumers, by and large, don’t seem to care about brightness, color, or framerate that much, unless it’s really bad. And most content doesn’t (and shouldn’t) depend on brightness, color, or framerate that much. With some real and obvious exceptions, of course. But on the whole I hope that’s also something film school taught you, that you design films to be resilient to changes in presentation. When we used to design content for analog TV, where there was no calibration and devices in the wild were all over the map, you couldn’t count on anything about the presentation. Ever had to deal with safe regions? You lost like 15% of the frame’s area! Colors? Ha! You were lucky if your reds were even close to red.
BTW I hope you take this as lighthearted ribbing plus empathy, and not criticism or argument. I’ve worked in film too (CG film), and I fully understand your feelings. The first CG film I worked on, Shrek, delivered final frames in 8bit compressed JPEG. That would probably horrify a lot of digital filmmakers today, but nobody noticed.