Starcraft IS a clickfest, but being a good clicker won't ensure victory against one who isn't. You need more than fast fingers (trust me you need pretty fast fingers in MP MTW).
And 6-pools are easy enough to counter. The problem is just that people of inequal experience meet and the experienced player uses a rush, then inexperienced playerwill go all "BROKE BROKE BROKE", but if he had played as much as the other guy he could have stopped it, besides unless it is small map the rush is going to be slowed hugely by the need to scout, giving even a player that doesn't prepared for a rush time to respond to it. And on small maps you have to expect a rush, and when you do it you can easily respond to it.
Its all about applying the right ideas. And a rush repulsed is going to pay back onto the rusher with great damage.