I agree that Amazon getting even more control over the ebook market would be bad for authors and publishers.
But how would (hypothetical) more formidable DRM constitute even more control over the ebook market?
(Do you mean more control by preventing more piracy? Or by preventing more good-faith circumvention? Or more control because ebooks might be published even more Amazon exclusive than they already are, because of superior anti-piracy protection?)
That control is only held by Amazon with their drm scheme. It’s not held by the publishers or authors. It does nothing to prevent piracy and only helps Amazon consolidate more control.
But how would (hypothetical) more formidable DRM constitute even more control over the ebook market?
(Do you mean more control by preventing more piracy? Or by preventing more good-faith circumvention? Or more control because ebooks might be published even more Amazon exclusive than they already are, because of superior anti-piracy protection?)