I don’t see an issue with an author updating their books with new editions.
I do have a problem if they ban the older editions.
I do have a problem if they ban the older editions.
I don't see how they are "banned". Banning means "forbidden, disallowed, illegal". The older editions do not fall under any of the definitions. They are harder to get, because the author stopped selling them. You can still find them somewhere, and if you already have them you can keep them, they are just less convenient to acquire than they used to be.
You’re trying too hard to defend the indefensible. eBay and Amazon stopped the used book market for these not just the publisher and rights holder.
According to your take no book has ever been banned in the US and people who complained about book banning were clutching pearls.