The thing I'd be worried about when doing this is spending $1000+ on a TV, then realizing it has some sort of pre-downloaded ads that it shows on the main screen ("sign up for your free six months of HBO Max!") or otherwise has a nag prompt that appears to tell you to connect to WiFi. I think that would be basically intolerable.
Been a few years since I had to get a new one, but I booted mine up, switched to the HDMI input for my AppleTV, and never looked back. Just boots straight into the AppleTV input when you use the AppleTV remote to wake it up.
We have to use the actual TV remote to debug some audio issues or disable the motion blur stuff again every once in awhile, but otherwise it might as well just be a display for the AppleTV. I’ve only seen the actual home screen of the TV a handful of times.
I guess it’s probably still spying on us somehow, and it seems like different models make using the AppleTV remote and booting right into the AppleTV harder than others, so your mileage may vary.
You have to be careful with this path. Some manufacturers embed LED's into the bezel and blink them at you (part of the IR sensor for the remote, to prevent you from taping over with electrical tape) if they do not have network.
Others just overlay banners on top of the video.
Caveat emptor.
That hasn't been my experience so far.
If its an Android TV, you can use an alternate launcher to avoid home screen ads.
Oh the horror!