Why is everybody too focused on the "public domain" part? I do not see any statement regarding the public domain books on Google Policies, unlike Amazon. https

Why is everybody too focused on the "public domain" part? I do not see any statement regarding the public domain books on Google Policies, unlike Amazon. https://support.google.com/books/partner/answer/166501?hl=en https://support.google.com/books/partner/answer/166501?hl=en https://kdp.amazon.com/help?topicId=A2OHLJURFVK57Q https://kdp.amazon.com/help?topicId=A2OHLJURFVK57Q Bookstores, not only the digital ones, are full of public domain books. What do we want here? Publishers not to publish those classics or to publish them but give them for free? Why is this any different for companies who fill empty pets with natural water and sell it to people? Isn't that public domain too? Don't they just wrap the "water"? Do they say that indeed they simply put the the free water in those fancy plastics? Beyond all my subjective views, there is one thing objective that it's not fair for Google to keep the money for themselves when there is no policy for it.