Well fairly new to pro ca i guess. Although its pretty much 2 years now. So i absolutely disagree with you that inferno is just a luck based map. The game, especially on high level, is based on a lot of reads and at the same time giving misdirections to the opponents. So whenever you see someone rotate to stack A or B its off of reads they have on either banana or top mid. So if you have full banana control you always just stack 4 A, thats never a gamble. On the other hand if you dont see and hear a lot of presents on top mid, it might be a great idea for the rotator to help his w b players out, especially if they are light on utility already.
Those were just 2 very basic examples of how ct inferno works, those are the rotations ull see in many pug games at a decent level i suppose.