To answer your original question, it's point is to be fun. Same as the rest of the game. SAB is one of the things that sets GW2 apart from other generic MMO's and helps it stand out from the crowd. And what makes SAB any more or less the heart of the game than any other content? Festivals are part of the game, and many players enjoy them. Nothing wrong if you dislike SAB, but it is an amazing part of GW2 that is part of the charm that keeps me and many other players interested in the game. If all you want is achievement points, the wiki shows that at best you can have about 670 achievement points from SAB so far. You can earn 15k achievement points for dailies alone. There is no shortage of achievement points in the game. And if you really only want the achievements, you can earn many of them within an hour or so of gameplay. Just do the normal mode achievements for completing areas, finding hidden rooms/shops, etc. With a guide it would not take long at all to get those, the only challenging ones are tribulation mode. Nobody is going to like every piece of content in the game, that doesn't make that content pointless.