People are watching the wrong game.
Disney+ isn't supposed to be a gamechanger vis-a-vis Theatrical. It's supposed to be a gamechanger vis-a-vis linear television, i.e. Freeform, Disney Channel, Junior, XD, FX, FXX, FXM, NatGeo, NatGeo Wild, and maybe even Grandma ABC herself.
They're not trying to replace box office revenue, they're trying to replace cord-cutter affiliate fees from Comcast and the like. They still want the box office revenue, but COVID took that away from them for a period of time.