Earlier quoted context omitted.
Is it? I’m still holding onto my TV from 2014 because it doesn’t have “smart” functionality. Every time I look at new ones I can’t find good dumb ones.
If you don't need any "TV" features such as a tuner or speakers, you might consider using a monitor. I use a 32" 4k monitor as my "TV". In my case, anything with a TV tuner requires an expensive license, so that's another motivating factor, but whenever I use someone else's "smart TV", I'm always relieved that I don't have to deal with glacial UIs and injected ads.
And, while I don't use the speakers, the TV's S/PDIF output is nevertheless handy for routing the audio output of whichever of the four HDMI inputs is active to the single S/PDIF input on my audio interface.
Finally, the TV has an RS-232 port that allows control of essentially all of the basic "TV" functionality, which was handy for setting up keyboard shortcuts for input switching, power, and brightness control; IME, monitor controls for such things that don't involve diddling with buttons on the side of the device itself are few and far between.