Pretty much this. My TCL 4K HDR TV I bought two years ago for like 400 bucks has Roku in it and... I just ignore it. I use game mode on it and it's hooked up to my M1 Mac Mini all day long. I use Parsec when I'm lazy and use my desktop PC that way on it. Sometimes I'll Parsec the other way around from my PC to the Mac while it's displaying on the TV and there is absolutely zero latency that is perceivable when watching a video and the sound on in both places.

No ads ever bother me. No camera to scan me. It doesn't do anything. Even when I disabled my AD blocker on my router it didn't go ape.