If my experience in correct, this would not stop anything. There are usually very basic arguments about data duplication and data reuse, ease of maintenance and so on, stuffs that should be on an introduction about Wikidata and Wikipedia.
But this won’t be enough and some people will push stuff more and more and demand more and more stuffs, and don’t care about those arguments. « Fake News » are in the air, and the Truth is not stopping them. Improvements in watchlist integration, edition on the client wiki and so on are stuffs which resulted of those discussion. There was a war on frwiki to slow down Wikidata infobox deployment enough to lead deployment that will need decades.
And in the end, I’m afraid this will not be enough because some people have a problem with the very idea of using data external of « their » wiki, a sensation of loosing control and will try to react by any mean, a fear to collaborate with foreigners …