There is no reason that any of these services need to be, or should be, bundled with "publishing". There are plenty of people offering these services, either per-page, or for an hourly rate. You can find them on any Freelancer website.
Do these NEED to be bundled? No. SHOULD they be? I don't know. That depends on the situation.
What I can tell you is that I care about good editing, consistent formatting, good writing, and an overall decent job in making a book. There may be loads of qualified people out there who can do these things as freelancers, but how do I know if the book I'm looking at to buy was edited by these qualified people, or by the author himself, who did a crappy job, or something in between?
Today, if I purchase a book from any number of reputable presses, I know exactly what to expect for these standards. Further, I know that many of these presses only accept quality vetted monographs for publication in the first place. I also know that the vast majority of books I want to buy (mostly specialized "academic" books) require a higher standard of care and expertise than average... and they may only sell a few thousand or even a few hundred copies, so they'll never even get put together for publication at a price of $10.
You want to live in a world without all that stuff? Fine. Let your books be done the way you want. But why does that justify you in saying it's okay for Amazon to bully publishers so it's no longer possible for anyone to make the kind of books I want? Obviously in many cases publishers are skimming money off the top. In the case of books I buy, the publisher often are losing money even when they charge $50 or more per book. (And yes, I know some of the people who run the backend of academic presses, so I'm not making this up.)
Why shouldn't someone who produces a product be able to decide its price? If we really want the market to be free and resolve unnecessary inefficiencies, then let customers decide, not Amazon. If customers only buy the $10 crap books from no-name press and self-publications, the publishers will naturally go out of business. If, on the other hand, customers are willing to pay $15 or $20 or $50 for a book -- for whatever reason -- why should Amazon be able to say the publisher can't charge that?