I do agree perhaps someone would want a simple file uploader or a reference to a URL or file/media library image instead. This wouldn't be a simple thing to implement though as essentially the multi-uploader field would need to be modified to also allow selection of a gallery. Then we use that field in the cms download screen.
v11.0 is pretty-much feature locked at this point so this may be something to consider for 11.1 or later.
v11.0 is pretty-much feature locked at this point so this may be something to consider for 11.1 or later.