That a thing would cause family drama is not the same thing as it being propaganda.
Also, regarding the homosexual characters mentioned in the article, does the adventures they're in say how others regard the homosexual relationships of those characters? I don't own STK or CoS, so I don't know. While I would lean towards acceptance (being a woman who predominantly is attracted to other women), others may not, and giving DM's the information that an NPC is homosexual gives the DM more opportunity to make their campaigns their own through differing perspectives on acceptance (or lack thereof).