I don't think many here are "stuck" on pro video and cinematic productions but it's where the discussion went and where there was a difference of opinion if DSLR's can be useful for that or not. But I agree the OP's question was just about video capability in DSLR's where he was questioning the usefulness and why anybody would use it. I agree with you, some people want and like video in their DSLR, if it's there you can always choose not to use it, but if it isn't there it will decrease the customer base. I almost never use the video in any of my cameras, but I'm not bothered by it being there. There's a lot of stills photography options in there I also never use, so what's the difference?
I have never found a camera that has all the things I need and none I don't want to use or need.
Now you've lost me: what, exactly, do you mean? That no camera fulfills your wishes, yet that all cameras carry functions that you find indispensable? In other words, you find yourself obliged to use everything the camera offers and that's not quite enough?
I use hardly anything my cameras have to offer; I strip everything down to the bare necessity of allowing the things to function as cameras, not as second-guessers of my intents. I make them as analogue camera-like as I can find how to do.
There is one function Nikon gives that I do find wonderful: Matrix metering.
I could very happily live without all of the rest beyond, in my declining years, af on two lenses. It's my credo that the less between me and the image the better.
Rob C