Perhaps this is not about selling this to you?
Like "I already have a car, so all car manufacturers everywhere should stop making cars." Maybe someone else wants to buy a car?
And doesn't pretty much everyone now have a phone? So should even Apple stop making new phones?
I know this is hard to believe, but there are people out there that don't revolve around Apple... that don't see anything from Apple as the one and only right thing for all and that all competitive things are junk/garbage/abominations/faulty/etc.
Furthermore, maybe you are single living alone or have only 1 TV at your home. Some homes might have a TV in every room. A sports bar might have 50 TVs to feed. 5, 10 or 50

TVs can be a relatively steep cost vs. 5, 10 or 50 of these things running pretty much the very same app(s) most of the time.
Again, there is a whole world of TV owners beyond the garden's walls. Some of them don't give a hoot about how far and away superior Apple is in every single way that a comparison can be struck. Instead, they might want 90% or 80% or 50% of what the masterpiece that is

TV can do for a fraction of the

TV price. Or they have 5+ other TVs to feed at home and would rather do so and have enough left over to buy that brand new iPhone.
I happen to have BOTH

TV and FireTVs on TVs in my home. Most used apps feel/play/seem IDENTICAL or so close it's not even obvious which box is currently feeding a video to the screen. That's making no passionate argument for FireTV but pointing out that it's pretty great for what it is... especially for those that might rather get most of the benefits without spending so much. Personally, I hope most of the benefits of

TV4K at this price point means Apple will push to build a much better

TV to clarify WHY it costs so much more, beyond an Apple brand mark stamped on it. If so, we consumers- Apple worshipers or not- benefit from Apple feeling some push to do more. Indifference and complacency begs Apple to do nothing.