It's a fair point. Back in GW1 I used to think Anet was a great company because they had somehow managed to design and refine GW1 into a really fun game. What's more likely to be true though, is that the game was fun at least ion part because players found ways to break the game which didn't really upset the designers and yet still resulted in some pretty crazy but really fun ideas. Things like running people though areas/missions/dungeons could be a lot of fun, even for the people not doing the work; 55 or 600/smite farming was way to powerful really but again, lots of fun; Ursan facerolling was the same. Anet let that stuff slide for a long time because players loved it, not because it was good for game balance or design. I guess the really sad part is that the stupid stuff they let slide in GW2 has a tendency to make the game LESS fun rather than how it worked in GW1, at least for me. At any rate, it does seem like the people running anet just really either don't know how to manage these things or don't care to, so long as the money keeps flowing... and that last part sorta does make sense from a business perspective.
Sometimes we forget a key ingredient in these discussions. As players, we want to game to be basically an amazing experience, a work of gaming art. We see flaws that can be fixed to increase the game quality from the perspective of a gamer. Anet, (or at least the leadership at any rate) on the other hand, sees a revenue stream. When what we see as flaws don't obviously subtract from the revenue stream, they don't see a problem. When the revenue stream is steady or increasing Anet's sees themselves as delivering what people want, regardless of players leaving or screaming about it on forums. While I wish they'd try a little harder to see it from our perspective, I guess they can't be faulted much for seeing it from theirs more often.