Earlier quoted context omitted.
The problem isn’t running your own infrastructure. It’s the extortionate rent for the big tech infrastructure and the anticompetitive DRM lock in. If there was a competitive ecosystem of client software and hardware and also online stores and it all interoperated, we would have a lot more choice, control of our purchased media and devices, and lower prices too.
What prevents the existence of such an ecosystem? What are the main obstructions? The most obvious ones I can think of are the data centers and necessary protocols but those are easily solvable problems with enough cash. The other obstruction I can think of is that consumers don't actually want these stores and protocols because they're perfectly happy with the services that big tech delivers. Convenience seems to be…
You're ignoring the elephant in the room, which is anti-trust is dead, and the tech companies running the show are too damn big. If you start a competitor to audible, it can use its leverage with both AWS and Amazon and squeeze you until you're dead, and then continue on with its monopoly.