Earlier quoted context omitted.
> The services may not work a la carte They don't need to. Prime could still offer Prime Video / Music as a membership perk. But if the media services are independent, maybe it'd turn out offering one or more of the others, or letting customer pick and choose, would end up making more financial sense (FireTV can already be used to subscribe to competing services in addition ) I'm not saying it's necessarily a good id…
This misses the point. A breakup would put Prime Video / Music (are those two even allowed to be in the same company? Why? Who decides?) on the same footing as Hulu or Spotify. This would create independent third-tier players in both markets. The consumer would likely end up paying more (because Prime Video / Music can't be run at zero or negative margins as part of a bundle; ditto for other media options like Spotif…
But even assuming that'd not be the case, anti-trust law is in large part aimed at ensuring competitors have fair access to the markets, not minimising costs to consumers. It's presumed that over time the former will ensure the latter and/or improve service, but it's really a separate issue.
That said, I don't see a compelling anti-trust case for going after Prime Video anyway - there's plenty of competition in that space.
However, there is also another possible cost reduction in forcing unbundling as well for those customers who don't want Prime Video, but want the other benefits. Not at all convinced it'd be worth it. That's not the part of Amazon that's a competitive issue.