Am I reading this right or are people actually saying finishing a dungeon quicker isn't more efficient?

The game clearly rewards speed.

Im also curious how many defending healers not DPSing are the ones that stand around for 30seconds between spells or if they're still learning to heal. Learning to heal is fine, constantly healing because of big pulls is also fine. Standing around for 20-30 seconds between cast is lazy no matter how you try to defend it. No other class in the game stands around doing nothing, why should us healers?