Just under the section heading - 'the need', a statement is given: “I want the information that appears on Wikipedia to be editable on Wikipedia”. My doubt is: should the last word 'Wikipedia' be replaced by Wikidata? Because Wikipedia can be edited on Wikipedia itself.
Topic on Talk:Wikidata Bridge
'Wikipedia' is correct here. If the information comes from Wikidata then it's not directly editable in Wikipedia itself and this is exactly why the Wikidata Bridge is needed.