What is Disney most known for. Mickey Mouse and Disney World. They don’t need ESPN. In fact I think both would be better apart. They should make the movie studio a separate division. Sell off the network side and focus on what they are good at.
The things "they're good at" are not cost efficient. Running movie studios cost a lot of money. You pay for people & facilities whether the movies make money or not. Most of the time they don't. So you need a source of cash, and you need an outlet for that content you're creating. Movie theaters are not the future of content distribution. Disney+ was a flop. They need to combine it with other content to make it a must-have.
Having a TV network and cable channels are distribution channels. The big expense are the O&O stations. For now, they guarantee outlets for the TV networks. But long term, they're expendable.