I’m sure it’s all legal. The Dahl estate is apparently involved. That’s not really the question.
Yes, it’s all about money. They want to keep selling the books. The don’t want to go through the difficulty of finding and developing and marketing new authors. They don’t want to run afoul of the small but vocal minority of people who are horrendously offended by completely innocuous language.
First, the Dahl estate (whether or not we approve or agree) is effectively now the “author.”
I don’t follow, do you not agree with capitalism? Of course the publisher and estate want to keep selling his books. No, I don’t think they care much about the “small but vocal minority” of people who are offended by Dahl’s language. No, what the estate really cares about are large but even more vocal majority of the potential buyers of the books. And the estate cares about current and future market for Dahl’s books. It is pretty safe to say that they are changing the language as purely a financial decision, to satisfy (their perception of) the modern book market to keep these books in current and future demand. So, assuming that you are a supporter of private property (in this case, IP), what is your problem with their carefully considered business decision to maximize the long-term value of their IP?
Rights to display Michelangelo’s David are held by the Accademia gallery in Florence. Should 2029 society decide that visible genitalia offend a preponderance of its audience, does the Accademia have a right to slap on a fig leaf, or remove the genitalia altogether?
TL:dr I don’t believe the question can be boiled down entirely to capitalism and market take.