This is the VGC forum, we only discuss VGC which is only doubles. If you want in-game/singles advice, then this is not the place to ask about it.
As for why we "take this seriously," Smogon is a site dedicated to competitive battling, what did you expect?
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Black 2 FC:
My Pokécheck Pokémon
RNG is kind of like firing a gun. Why shoot blindly in every direction until you're lucky enough to hit the target when you can just take the time to aim properly and hit it with one shot?