I was going to ask this question in that big argument/debate thread of bannings and Smogon and the like, but it was locked...so I'll ask it here. If a Pokemon becomes banned for being over-centralizing, why didn't the same thing happen to Stealth Rock? SR single-handedly over-centralized EVERYTHING about competitive battling. So much that Rapid Spin is considered a worthy move-slot, and Pokemon that are weak to SR are suddenly bottom-tier trash that gets laughed at, and EVERYTHING has to be prepared to set up AND fend off SR and other entry-hazard hazards.
It's mostly my own confusion that's making me ask this question, since it doesn't make sense that a Pokemon can be banned for over-centralization, but Stealth Rock gets a free pass. I'm not attacking anyone or anything; I'm just genuinely curious. D8;