It does seem very silly (and self-indulgent) to be making these changes. The cynical part of me sees this as attention-seeking and a very easy way to create work for a talentless group of people.
When my children read my original Enid Blyton's, I used it as a discussion base. Some of her writing (tiny proportions of the overall story), taken out of historical context, is problematic. However, they are a product of their time, with the social/class norms of that time. We discussed those elements, why the author might have used that description and why it isn't acceptable now. Eldest (now a young adult) gets very angry at these changes, she says they make the stories anodyne and paper over why authors have written in that way.
I believe this has helped my children understand authors can be flawed people. In child appropriate ways we ended up discussing racism, class issues, and feminism - amongst other things. Surely it is more helpful to teach our children to recognise these elements and critique them - rather than produce a new version pretending they never existed?