Agreed. Most of the people I know that are showing interest in the game outside of these forums or more niche places aren't D&D fans. I'd almost be comfortable arguing people that really know D&D are going to be in the minority, we're already seeing a ton of reddit posts that are 'I know nothing about D&D, but...' and other related threads. Advertising to the mainstream RPG fan is definitely the route to go and the market they need to tap into; BG3 is already on the radar for D&D fans.