this is the thing! Pretty much all culture created in your lifetime - music, movies, books, photos, poems, artwork - will be under copyright until you're dead, and most of it owned by a handful of corporations, and most of it unavailable to you simply because it's not profitable.
You are not describing anything deserving of a new copyright, because all the new elements the engineer is "revealing" is still in the original recording. They aren't adding anything new, but simply creating an alternate version for playback on more sensitive equipment - such as the difference between mastering for LP and for CD, or turning a mono recording into stereo.
A channel and a streaming service are the same in this instance. A service might offer more content than a channel, but you're basically paying for a limited selection. It's the same as paying just for HBO or Showtime - even if both channels offer some of the same movies.
Cabel ala carte was never about watching one show.
That's not what cable ala carte was all about. It was all about let me pay just for HBO, or just for TCM, or just for the channel I want. Well, a streaming service is more like one of those channels, and we'll probably see more niche streaming services (like sports streaming) that are more like niche cable channels.
Obviously if you only want to watch one thing, this isn't a solution. Better to just buy that one thing directly (if it's offered). Most people don't want just one thing.
If you're someone that must have access to all content ever created, then you might as well stick with cable.
One streaming service can give me more than enough stuff to watch, and I can changes services throughout the year if I want to see something else. Cord-cutting isn't for cable addicts. It's for people who just want something to watch now and then and would rather spend their money on other entertainment, like books, music, and live theatre.
Personally, if I can't press pause, I don't watch it. I watch things on my own schedule, so cable and broadcast TV seem antiquated to me.