You are suppose to buy fans, you can pick and choose which type, colour, brand, etc.
If you buy a case with fans, you pay for the fans in the price of the case. And if you do not like the type or rgb, etc, then you still have to buy a different one to replace.
Fan-less cases are preferred by those that want to really customise their pc. Fully water-cooled, perhaps, another option. fans generate sounds and vibration, regardless how silent they claim