The point I was attempting, but obviously failed, to convey, was that yes 1 time out of 10 Brick Brick might prove to be more beneficial than Earthquake, but those other 9 times Earthquake (or the dd 2 attacks set) will prove to be the better option(s). The whole point of team building, or making a set, is to put something together that will work most of the time, and we can safely assume that 9 times out of 10 is most of the time. Nothing can work best all of the time, thus we have different options, but there are some options that work best more often than others (i.e using Earthquake over Brick Break.) The only thing that Brick Break makes an important difference to is Tyranitar, which is all fine and dandy, but going back to the options, you can only make one, and for pretty much every other situation, Earthquake is better. The opportunity cost of using Earthquake is being able to kill Tyranitar, but the opportunity cost of using Brick Break is that bit of extra damage against pretty much every other grounded pokemon. And if that bit of extra damage is unimportant, then why do we bother using things like hazards, which essentially achieve the exact same affect?