If people actually cared about the statistical relevance of representing diversity on TV we would need to change out around 40% of all current people and add in someone from china or India. We would also need to change out 90% of everyone else because they are at our below their body mass index, unlike 90% of the rest of us watching the show.
And everyone on TV has perfect skin and teeth. Unlike reality.
TV and the movies are about entertainment, so I get it.It's just a bit of a lie and pandering and has nothing to do with actual statistical diversity. Like duh.