Extract Shapes in InDesign is in essence a good idea, but with a bad execution.
And it has been like that (not so smart, that is) since its inception as the original Shapes app or even now within the Capture app for mobile.

In stead of yielding a directly editable vector based result (with an Illustrator signature) it creates a purely black and white 'graphic' file format, which still needs a lot of handling to e.g. change the color of its vectors.

Suppose I'd like to use the traced outlines of a flower, or the extracted rough structure of bricks, in green, or brown. I can use the Capture app directly on a live photo or image, or apply the Extract Shapes feature inside of InDesign. But the result is a placed Cloud Library item, with no immediate or easy possibility to change its black/white appearance.

In essence, it's a bunch of vectors, but:
- I can't edit it easily as (a group of) vectors inside of InDesign;
- it won't let me edit it through opening the placed item in Illustrator;
- it forces me to accept the result as newly created Cloud Library item;
- but double clicking the Library item won't open it in Illustrator either.

I have to go to Illustrator, whip up a blank file, drag the Cloud Library item into it, copy the vectors to use them in InDesign, or drag them in the Cloud Library as a NEW item, to be used in other applications like InDesign (and edit them anytime in Illustrator).

Why not let this Extracted item simply be or become a vector-based, Illustrator-aware item, and let me maybe choose to paste or even replace it immediately as a group/compound of black and white vectors or to place it as a Library item but with the obvious option to immediately edit the vectors through Illustrator ?