Now, I am going to be very skeptical and assume that the primary concern is not dwarves but halflings, as dwarves have been a established fantasy character across many fantasy universes and I have *never* heard anyone draw the conclusion that there would be any problems between the romance of Tauriel and Kili (The Hobbit movies) or any similar dwarven x non-dwarven relationships.
I agree with basically everything you've said Dez, but I want to point out that the Dragon Age series infamously doesn't have any dwarven npc full romance options. There's an oft-cited (and likely taken out of context) quote from a writer: "female dwarves often look like 14 year-old girls."
DAI has a female dwarf NPC that you can flirt with throughout the entire game but that doesn't develop into the typical Bioware romance event. Which I guess is what @Blackheifer may be suggesting: romance but no sex. But then we circle back to it being weird that you can have graphic relations with some npcs but not (certain races of) other npcs...
