Could be any number of bad reasons. Perhaps you you should check with the creator of the profile (Added by: Eric Effendi van Zanten on August 10, 2008), or maybe the Curator (Curated by: Ben M. Angel, still catching up).
Richard Young is listed over on FamilySearch-dot-org and the birth date there is listed as 1630, not 1650 (So, maybe a typo). The bigger issue is that as far as I can tell there are zero sources that he ever existed at all on either of these sites, let alone any birth dates or places. Over on WikiTree-dot-com, where sources are required in order to add profiles, Mary (Young) Wormwood is a "dead-end" (parents unknown).
