I'm really sorry for you all who are fans of the big screen. But movie theaters have been struggling for a long time. Disney is certainly NOT "walking away from a huge stream of revenue," they're cutting out the middle man!
I think the content you see on Disney+ (and will see much, much more of in the future) is the result of Disney finally realizing that the world is not one huge audience, but a collection of lots of smaller audiences with more niche interests.
The selection on D+ may not be your cup of tea, but is increasingly tailored to the tastes of specific audiences. Don't worry, they'll eventually get around to making more content targeted at Busy Dads. It's just that in most households,
we're the holdouts still watching cable! The big budget blockbusters will be a thing of the past, but the shows are going to be much better!