I don't understand your point. Even if Kindle doesn't let you open DRM-Free epubs (no idea if this is the case or not) there is plenty of software that does.

Yes, Kindle was my point - it applies the same rules to everything even if the text says something to the effect of the publisher has released this free of DRM. You still can not copy and paste a passage of text, even though the publisher and fair use allow it.

Buy from somewhere that sells epubs, like Kobo. The Kindle Store uses Amazon's primary format regardless of whether or not a book has DRM.