Sure I guess. But those devices objectively suck. the CPU and storage in "smart TVs" are so underpowered that using streaming apps on them is painfully sluggish.
For comparison, I've used the "Chromecast with Google TV" (a $50ish at its release 4k streaming stick that uses the 'Google TV', fka 'Android TV' platform) and a Sony TV on the same platform, released the same year. The Sony UI is a lot more sluggish than the Google stick device. Also tested running an SNES emulator. The Google device can easily do it, the Sony TV can't keep up even on a basic game like Super Mario World.
And then of course, on the other end of the spectrum, the Apple TV exists, which specs-wise can easily play 3D racing games at a fine framerate.
I don't try to do anything like run a console emulator on them though. Just watching streaming channels and YouTube TV.
IDK about the specs on yours, but even things like bloated sizes of apps themselves on disk can become a problem. What happens when the OS and the apps inevitably go up in size such that the 8GB or whatever TCL has decided to give you cannot hold the OS, Netflix, Disney+, and HBO at the same time? They don't just let you stay on old versions anymore, either.
Except in that case don't you have to give the TVs themselves Internet access? Do you trust any TV with such access nowadays given all the tomfoolery with surveillance that most OEMs do?
I believe there are TVs that come with AppleTV built-in. I'm not in the market, so I haven't looked, but I suspect they're not the bargain basement Wal-Mart sets.
https://dcurt.is/apple-tv-all-the-way-down
(Since that piece, they've renamed Apple TV+ to also be "Apple TV".)