The grand majority of tournaments I've attended haven't been line up and kill each other. Granted, I didn't play a ton of Fantasy tournaments, but I didn't like the system.
However, I'd also counter with GW doesn't, and didn't really give more than lip service to the tournament scene. And when they did, they promoted the "just bring the most broken thing you want" mentality.
However, if you play the game by the rules set out in the main rulebook and work with those scenarios, the games are usually pretty good.