Can somebody tell me the point of the Apple TV? Genuine question.
We have a smart TV and it's just simpler to use its own apps for things like Netflix or Amazon Prime, rather than mess around switching HDMI input and booting-up the Apple TV (which we do have, albeit an older one).
If I want to watch Apple TV shows then I do so on my phone, or MacBook.
Just about the only reason I've ever seen anybody use an Apple TV is for beaming photos onto the big TV screen. But that's not exactly an everyday thing.
Your "smart TV" comes with
- a limited set of apps
- with a specific UI and
- with a dubious likelihood of being updated
Apple TV offers a much larger range of apps, a cleaner UI, and is likely to still be updated in five years.
I have an LG C1 so about as top of the line Smart TV as you get (until you go to $10's of thousands!) but I find the apps UI to be horrible and the shakey mouse/remote to be terrible to use.
As examples of apps that probably aren't on your smartTV, there are things like library-provided content (Hoopla or Kanopy), or TV-recording apps like Channels DVR. I'm not sure how common the free-content providers (like Tubi, Pluto, even Plex TV) are on smartTV's, but they're all on aTV.
I have no idea about your setup, but for my setup the aTV is always on (no boot-up time), and always what's in control of the screen (no HDMI switching time). If I wanted to watch LiveTV, I would do so by switching to the Channels DVR app and watching live TV there. If (god forbid) I wanted to subscribe to a Cable Service like Spectrum, I would switch to the Spectrum app and watch Spectrum content there – no bulky hot Spectrum box, no need to switch to whatever HDMI port that Spectrum box is feeding.
Ultimately it's like asking "why own an iPhone instead of Android?" Sure, Android is cheaper, but iPhone overall feels nicer, smoother, more consistent, faster. If those matter to you, you do whatever you can on the iPhone.
Same with TVs. Even dumb things like the aTV remote feel so much better than what the TV provides, even a high end TV like an LG OLED.