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.
Tom