If fractals (or any PvE content in GW2 for that matter) were designed well, this wouldn't be an issue. People would do Fractals for the challenge - but currently, there is none.
GW2, as it was designed from the ground up, cannot be challenging. "No trinity" means no tight-tuned encounters.
I love it most when I can skip the irrelevant and fluff content and get to the meat of the instances. Why on earth would I want to clear through 15 minutes of trash mobs when I can skip them and move on to things that drop loot and progress me in the instance. Your attribution of negative qualities to efficient gameplay is horrifically near-sighted.