AppleTV was never #1, it was more of a niche device.
For the general public, the ones that drive tv ratings up and push the Box Office revenue, they won't care that they have AppleTV shows if the content isn't good. Name me a hit AppleTV show or movie?
Without having a biased towards Apple and considering that the Disney app is showing up on all TV's and streaming devices, really look at the arsenal of content Disney has and the name recognition, and tell me how is AppleTV+ going to be the top streaming service and how is it going to dwarf Disney?
Just look at the top 10 Box Office movies this year and see how many spots and how much revenue Disney made, and the year isn't over. Plus all the content Disney has from the Fox studios purchase they made earlier this year, the bundled Hulu and ESPN+ service. How exactly will "Apple will be the number one video streaming service in the entire world with over a quarter of a billion subscribers to Apple TV plus, dwarfing everyone else."?