This graphic is literally showing why they should not mash up the services. These are distinct audiences that want different content experiences. Forcing dissimilar things on each other is like peak GE. The decision making is dumb and cost driven. Their reach will be smaller combined than if it were separate.
No, this shows that there's a potential of shows reaching a wider audience by combining the two services because each leans towards a target demographic. One is less likely to get the other based on that content, but if you merge it together it means it's more likely to get some cross over from those demographics watching the other content. It's saying that merging the two can have a single service that reaches a wider audience as a result.