Citing sources is highly encouraged, in fact is strongly recommended.
With that said, many online family histories are the only source of information, not the best of sources.
I see it most often stated in these books that John Smith (focus of a biography) was the son of James who was the son of William from England.
This the only information we know about William is that he was from England.
But I agree, making the effort to examine and cite our source and to give complete information is most helpful. So if the source says Bakewell, Derbyshire, England. Then go ahead and put in the full location and cite your source.