I suspect you're both looking at two different things. It's one thing to "plug in a new TV, connect an Apple TV, click 'yes' a bunch of times on both, and be done". It's quite another to go through all the settings on both the TV (differing from one manufacturer to the next) and the Apple TV, and make them play optimally with each other. And you'll get a number of arguments about what constitutes "optimal" along the way (things like matching frame rate between streaming content and what is sent through to the TV, running menus in SDR or HDR, etc.).
I think a thing that would be cool, and wouldn't cost a ton to implement, but the TV manufacturers would never go for it, would be to introduce a "Made for Apple TV", uh, branding, I guess (program or some such), where the manufacturers would have a button (or section) in their settings menus, where you click that button and it changes a few dozen settings in the TV to set it up optimally for working with an Apple TV (and a button in the Apple TV settings to say "the connected TV is configured for 'Made for Apple TV', so adjust accordingly"). *Then*, then consumer could get everything set up optimally with just a couple of button presses.
The TV manufacturers will never go for this, because it downplays (their perceived) importance of their (mediocre-to-awful) built-in software/apps, and it would require a little effort on their part. And Apple would tend to want to make manufacturers buy into this scheme, when instead they should be doing everything they can to entice manufacturers to support this.
One avenue they could take is, make a deal with the first company to step forward (but one with really good screens, like LG or Sony): you put this stuff in your menus, and we'll showcase your TV in our Apple Stores, and sell it for very little markup. LG/Sony would get prestige and some sales, and consumers could go to an Apple Store to see/get a streaming TV setup that "Just Works".