I don't know why you can so confidently say that. Dragonborn are, by all accounts, a very, very popular choice for tabletop. Yes, the HeHe races get top billing as always, but, considering Dragonborn and Tieflings are such late comers to the table, it's impressive that they get played as much as they do. No one tries to claim that halflings should be virtually unheard of considering they are played so little. Or gnomes. Both have been scraping the bottom of the barrel for five editions and yet, apparently, they're all over the place.