This is most likely the exact same situation as when John Wardley was the creative lead at Tussauds. Creative projects like this always require massive teams, you only need to watch the recent documentary on The Haunted House to see that it was the product of a large creative team working together.
The leaders on creative projects always get the lions share of praise (Or criticism!) because they are the public face of the project. It’s the same reason we revere film directors even though they’re one part of a larger team. John Wardley’s role in his projects is most likely over-estimated by quite a few enthusiasts.
Also, @Theme park Fanantic pre Tussauds, shops on Towers Street sold brands like Gucci and Cartier, among others. Pretty wild to think about designer brands being on sale at parks these days!