If Wikidata has an ambition to be a really reliable database, we should do eveything we can to make it easy for users to use any source they want. In this perspective, if we got datas with guaranted high quality, it make it easy for Wikidatian to find and use these references for users. Entering a reference in the database seems to me a highly fastidious, boring, and easily automated task.
With that in mind, any reference that the user will not have to enter by hand is something good, and import high quality sources datas should pass every Wikidata community barriers easily. If there is no problem for the software to handle that many information, I say we really have no reason not to do the imports.