There is no flourishing of the market place here - it has been implicitly denied. If there were no copyright - you can be bet your years salary that there would be folks willing to publish these books for the audience that wishes to read them.
Remove the copyright - make it a true free market and THEN let's see if your argument that the ideas themselves are not popular enough holds true. Besides your statement of financial justification is utterly false. Dr Seuss tops the list of top 10 children's books.
No, its fascist ultra-left ideology that is responsible for these implicit bans. Some folks want to dictate what other should read - capitalism doesn't even come into the picture.
https://www.usatoday.com/story/life/books/2019/03/01/dr-seus...
And I’m not trying to move any goalposts. In several conversations here I’ve been assured that the actual problem is not the discontinuation of these specific books, but the larger picture wherein under some slippery slope argument the general ideas could be eventually banned outright. But apologies if this is not your position and you take issue with the ability of these companies to control their own IP. I would agree with you there.
But at the same time I also recognize that copyright is built into our Constitution and it’s not going anywhere anytime soon. So under that framework, I don’t see anything wrong with what Dr. Seuss Enterprises did. Copyright gives them freedom over the creative works they own. The freedom to distribute and the freedom not to distribute. Without the freedom to not distribute works, the decision to publish any works becomes risky for the author, because it cannot be undone, ever. This is going to have the necessary effect of reducing the number of ideas that are expressed, as riskier ideas cannot be retracted by their authors. After all, this is the general idea behind the concept of copyright and underpins the entire marketplace of ideas.
I have no doubt that if copyright were abolished, others would pick up the unpublished works and attempt to distribute them. But this comes at a cost of time and money. What if they don’t sell enough copies to recoup the effort, and they go out of business, thereby halting publication? What if seeing this failure, no one else takes up the mantle of publishing these books? We are in the exact same situation. Would you say they are banned? Of course not, they have just failed financially, which is what happens all the time to books, and what happened in this case.
Dr. Seuss Enterprises surmised that the continued publication of these books would hurt them financially. As your link indicates, they publish a number of very popular books, but notably none of the books in your link are being discontinued. We already know the ideas aren’t very popular because they don’t sell well as it is. If they were popular, they would be on your list.
Anyway, tldr; don’t blame leftist ideology for the perceived failure of a system of, by, and for capitalists.
Dr. Seuss Enterprises has decided to stop publication of their particular expression of these ideas because the ideas themselves are not popular enough to financially justify their continued publication. That's the method by which the whole system works. Ideas flourish in the marketplace when people support them. When people support an idea, it achieves financial success for those that express it. People who express unpopular ideas difficult to find financial success due to a lack of a support base.
How else do you imagine the marketplace of ideas works, and what exactly do you think happens to ideas that are rejected by the marketplace?