I'm really sorry if my naïve comment made you sad. :/ To be clearer, I never wanted to minimize the contribution of the volunteers! It's just that I still don't know the internal mechanics of Wikidata. I recently read in a paper, already a bit old*, that 90% of editions were made by bots. I just thought that the mapping between the Wikipedia editions and Wikidata was part of these 90% automated tasks, after which the volunteers had to add the missing 10%, correct and enrich the automatic operations, etc. I'm sorry if I misunderstood.
* " Wikidata has grown significantly since its launch in October 2012; see the table here for key facts about its current content. It has also become the most edited Wikimedia project, with 150– 500 edits per minute, or a half million per day, about three times as many as the English Wikipedia. Approximately 90% of these edits are made by bots contributors create for automating tasks, yet almost one million edits per month are still made by humans." (VRANDEČIĆ, Denny et KRÖTZSCH, Markus. Wikidata: a free collaborative knowledgebase. Communications of the ACM, 2014, vol. 57, no 10, p. 78-85.)
