I would guess TWDC thought this would do as well as Cinderella, BatB, and Lion King.
So, if it doesn't do that well, it would be disappointing, and maybe... just maybe they'd change tack.
But WDS (live-action studio) is still following the hit-and-mostly-miss formula of the past 6 decades of throwing story ideas at 3rd party writers, directors, and producers and hope, that on their own, they'd make a hit.
The reason Pixar and DAS had been doing so well (up until recently) is that their own staff produces the films in a process that gets regular feedback from *everybody* working at their respective studios. This was the John Lasseter way. And then it got transposed to DAS.