This article says Amazon “seeks to control what content is read in which territory of the World.”
That’s not an accurate description of what is going on.
Amazon signs contracts with publishers, and the publishers specify which countries Amazon may sell the online books to.
There may be multiple publishers of a book, each having licensing rights to a different part of the world.
Or a publisher might decide for marketing reasons to only allow the book to be sold in a certain country. They might decide to charge a different price in a different country, and it’s up to Amazon to stop people bypassing the region restrictions with Proxies.
I really doubt Amazon would arbitrarily want to stop sales in a particular country if they weren’t required to do so by their contract agreement.
I agree with you that amazon doesn’t want to stop sales. The point is that if these had been physical, paper books, this deletion could not have happened.