There also exist people who would rather avoid buying books where the publisher changed the content in 1984 style to appease the woke moaners.
Admittedly that's actually a more complicated when it comes to electronic texts which may be automatically updated.
With 1984, I meant the book by George Orwell where newspaper articles of the past are permanently changed (and any references to the existence of the old versions are destroyed) to fit the daily political climate/narrative.
In a conversation about censorship being used to alter past events, I'm somewhat surprised you didn't understand the reference. Can I suggest this is a book you read as a matter of some importance:
There was indeed a huge backlash in the UK, amongst authors and the public, when publishers sought to edit classic children's books by Roald Dahl and Enid Blyton to make them politically correct. Children a quite capable of understanding something was written at a different time.
Even if some person is certain that this is not the case, the child's parents hopefully are capable of explaining this to their children. :-)
Sometimes you just want to read a book and children books are not all that much fun for adults anyway. You might not want to then have to go into explaining that racism was normal for the author, but we think differently jadda jadda ... it is additional completely pointless complication for what was supposed to be good night story.
It is something you will need to explain to children at some point, and doing so over a light hearted story is an ideal approach. Shying away from the difficulties of bringing up a child isn't something you should be doing.
Besides, the best children's books are also fun for adults! (I raise you Roald Dahl's 'Boy' and Judith Kerr's 'The Tiger Who Came to Tea')
Also Kipling's Just So stories. My eldest loved me to read them to him and it was no chore at all.
And I am not always interested in research about the original reason - how much author was or was not racist.
I don't know how you define best children's book. I found most of then boring and kids taste was not the same as my taste.