Disney is taking a big bet the first 2 years or so, because they need to. They need to get that BIG viewer base year one, around the world. Disney probably also knows that movie theaters will eventually die, and the cable business model is fluctuating, and the home media sales are not what they used to be. You better have an answer for the future or you will die in the past.
With this big push Disney can't be ignored and the value that Disney is pushing with content alone is second to none. Seriously, Disney could have charged double what they are charging and still be a bargain. But that is also the point. They need to be the streaming service people choose over all the new ones coming out.
Right now, the Warner Bros streaming services are split to 2 services HBO max, and their DC stuff, and I think one more. If Warner Bros got smart and combined them into super value app then they would be pretty darn compelling. As for the Peacock, who knows what that will eventually have for value, and the streaming service with Star Trek has the Trek fans, but that is all. Disney, needs to make sure they are one of the 2 streaming services EVERYONE worldwide decides to buy.