It’s not just to have a “do over” that doesn’t involve the original cast, it’s to cut them out of the royalties. Literally the entire point is to make sure all the money made by Harry Potter goes to transphobes or people willing to work with transphobes.
If you watch it, you are supporting bigotry, hate, and oppression. That’s just objective reality. All for a story that you probably have already seen in movie and book form.