Full systems with no fans, advice please

[drhax]

I'm a bit out the loop about PC parts but I see quite a few systems with cases with no or 1/2 case fans and no option to add more fans. For example: https://www.overclockers.co.uk/ocuk...force-rtx-3080ti-pro-gaming-pc-fs-1el-og.html
If I bought this right now the case would have no fans other than the AIO in a 4K system. I'm I missing something obvious?

 

[drhax]

I have bought two systems from OC before and were ready out the box. I dont understand why they are selling high end systems with no or not enough case fans preinstalled or a option to add some, I know they would if you asked. I'm not bashing OC they have given me two good systems but it doesnt make sense, seems like a oversight. If someone spent 4K on a custom build thats been tested, they would expect everything to be ready out the box. If I didnt do more research I could have bought the system thinking its ready out the box like my last two.