I was using the apps on my smart tv until I read their updated privacy agreement. It was basically saying we can record you and sell the recordings however we please. I turned off WiFi and just use Apple TV now.
Yep, a lot of "smart" TVs these days have Automatic Content Recognition (ACR), that watches the image on your screen and tries to match it up with a library of known movies, shows, current broadcast TV, etc., so they can figure out what you're watching and when, so they can sell this information to data brokers, who use it to add to existing data they have about you, to in turn sell that information to (mostly?) advertising companies, who can in turn charge higher prices to companies that want to advertise, because they can say "this is a 30-35 year old single male living in zipcode 12345, who makes $X,000 per month, and
likes watching football and Star Trek" - because they can charge more for showing an ad to a carefully defined person like that rather than showing it to "this is a person living in zipcode 12345".
I had my now 4-year-old TV connected to ethernet for a little while after I bought it, so it could get firmware updates, and then I pulled that cable out, so it can't phone home. I had made a point of not agreeing to all the EULAs that would have turned on their "built-in" (downloadable) apps, or their app store, or movie rentals, or
ACR (see above), and I never used the apps in the TV for anything, but after a while someone in the marketing department at the company (LG) got the bright idea that they could use the "mail" facility in the TV (which had previously told me that firmware updates were available, or, say, occasionally when they added a new streaming service) - they figured out they could use that facility to start advertising all sorts of "special offers" to me, often multiple times for the same offer, so I'd turn on my TV and get 3 new messages every time, so I pulled that plug.
I use the TV's brain only to tune in broadcast television on occasion (SNL, the Super Bowl, the Olympics) - everything else is Apple TV or PS5, with the TV acting as a display panel and HDMI switch. It does that quite well - although it has this habit, sometimes, of saying, "well, I'm waking up because you turned on your PS5, but hey, the last thing I was talking to yesterday was the Apple TV, so I'll say hello to it too! ... oh look, the Apple TV is talking to me now - I'll switch over to that!" (because HDMI-CEC still isn't a completely supported standard, apparently).