It's viewed as over-the-line to mention someone's former name, so they can't even say "The artist formerly known as..."
It's offensive to say Ellen Page changed their name to Elliot Page? So saying what happened is offensive? It's offensive to even say Elliot used to identify as female in gender and went by the name Ellen? Do they have to burn all the old DVD's that say Ellen Page on it? Do they have to erase the footage and insert Elliot Page?