Disney uses an integrated account system now, if you sign up in order to buy park tickets or use the Disney world app you are probably clicking through a similar agreement anyway. And if you were never going to visit Disney in the first place I'm not sure what other control Disney has over you from these terms.
To be clear I don't agree with this motion to dismiss, I just feel that's hyperbolic. If Disney were to win they only "have you over the barrel" as it pertains to your use of Disney products. Which if you're only using Disney+/going to the movies I'm not sure how severe of a dispute you can have against them. And if you're going to the parks it would be unavoidable regardless of subscribing to D+. Though I'm guessing this won't be upheld.