So let me get this straight based on the responses here:
If you are going to go, then go with the understanding what you just stated was purely just your assumption more than anyone making such a statement. First, GP is not a (GaaS). (GaaS) is typical of games that are a continued service like free to play, Destiny etc. GP is a game subscription model and would be considered as a rental service or along the lines of Netfix, Hulu, Disney you pretty much name it. It has a list of games you can play that come to the service and stay on for a period of time before leaving. Content created by the creator stays forever or for as long as they wish.
Now that we got the definition of (GaaS out of the way, games like (GaaS) actually do not need a service like GP because they are their own service with their own monetized model to make money. You would never have to put a (GaaS) Type game on GP unless it has some single player component like Destiny or Marvels Heros. Even still, for those games you do not have to invest in the (GaaS) part.
So no, it does not make sense to ensure best gaming content for the industry because at the root of your post, its totally flawed. Once you understand the different models you should come back and then have another discussion that way you will not be confused with the different types of services.