Stupid question: why are Helldivers 2 more popular than DRG? (no hate to h2 community, asking out of curiosity)

I see people talking about Helldivers 2 everywhere, but i rarely see a DRG fan out in the wild. My question is: why? Is it because of the graphics or because it has better gameplay? Or Sony is the reason? As stated in the title - no hate to anyone, asking out of pure curiosity