Honestly, sometimes it feels like the entire fan discourse operates on two parallel tracks: one for the actual game content and one for the extended lore of who's holding hands with whom. The shipping debates are this weird, self-perpetuating engine that drives so much conversation. You'll get these massive, detailed analysis posts about why a certain look during a cutscene is 'proof,' and then a hundred people arguing about historical parallels in Liyue.
It shapes discussions because it forces people to engage with character motivations and backstory on a hyper-granular level, even if the conclusions are totally subjective. You can't really talk about Xiao without someone bringing up his dynamic with the Traveler or Venti, and suddenly you're in a morality debate about immortal suffering versus found family. The downside is it can drown out other interesting topics; try having a calm discussion about elemental reaction theory and watch someone slide in with 'Well, if you read the flavor text on this dish, it's actually a metaphor for Childe's unrequited feelings.' It's exhausting but weirdly central to the fandom's heartbeat.
What I find more interesting is how it creates these micro-communities within the larger one. You don't just join the Genshin fandom, you join the Chilumi or Xiaoven or Kaeluc sub-fandom, each with its own memes, fanart tropes, and accepted canon interpretations.