The entertainment industry is one of the worst possible places to look to try and define "same work". You can easily have two people sat next to eachother where the audience wouldn't care if one was replaced but would leave if the other was. It's like saying musicians should all be paid the same.

I'm left wing and feminist as they come but this gender pay gap narrative is so consistently misrepresented it drives me mad. We're slipping into a society where all professions have quotas because everyone is terrified of a false narrative.

Are you sure about that? I couldn't find any information showing that men and women were paid differently for the same work.