like why do you actually play it
First of all, some people love gacha systems in games for obvious reasons, and second of all I love open-world games and the fact that genshin has a huge storyline that is incredibly hard to complete if you are a casual player (doesn't affect casual players cause most of them aren't completionists)
Because its fun and people enjoy that sort of game, I'm a casual player because I like the character designs and storylines