Yes, lack of real research is epidemic here. And db-error-fixers should not be doing research - if you can't fix it with the info available, move on. (I already gave up though because of the attitudes.)
I also feel any unsourced connections found that do not seem to fit (e.g. date is way out of bounds) should be unlinked without further discussion because the rules do say sources are supposed to be cited. Make the change, note the change, move on. Wiki is all about multiple people editing - otherwise it shouldn't be wiki based.