it's all just fickle trends my man, 15 years ago ppl were saying the same thing about multiplayer FPS's and 3rd person cover based games, now it's all about live service and open world gacha, they're hogging the spotlight for now but eventually we'll move on to the next big thing, no need to worry
However Genshin-type games all have this samey look. (Wuthering Waves, Star Rail, ZZZ, and Genshin obviously). I sound like a Mihoyo/Kuro games hater, but I genuinely believe games like these got carried by cash.