OP, why does it hurt your feeling so much that people don't play the game your way? The people aren't at fault here, SE is. If they made the trash rewarding at all, people would do it. Make them drop gil. Give them a 2% chance to drop a good piece of gear or a tomestone of mythology. Anything to make people actually want to clear.

SE made it -punishing- to kill the trash. Even if you don't take a single hit, you lose durability because of invisible exp the enemy is worth. For what? a small chance at a 1 gil drop per mob? No thanks. I play a game to enjoy it, not to get punished. The answer isn't taking out speed runs, its making the non speed content rewarding and/or fun.