On the other side the guys you face on the ladder are not classic, stats, hero, zest, nor trap.
If BCs don’t work for you, it’s probably you’re doing it wrong. But if you keep thinking that because YOU don’t manage to win with them they’re not viable, you won’t ever fix what’s wrong on your way of playing with them.
SC2 is a hard game, and they’re professionnal players, you’re not. If it works for them, it should inspire you, but you have to think a bit deeper than “I’ve built BC, where is my win ? Oh, no win, that’s not working, let’s whine about that on battle forums instead of studying replays and vods of the best terran of the world instead”.