Enrage timers are basically gear checks in this game. Cant beat the enrage timer? Your dps needs better gear and damage output.
But what actual purpose does it solve? Why does it matter to anyone how long it takes to accomplish the goal if you can accomplish it?
My point being - we have the DPS to down the mob, we have the gear to not die while doing it, we have the tactics to defeat that actual 'real' mechanics of the encounter. We just take 30 seconds longer to do it than you do and we get a solid wall of 'no pass' put up because of it.
That is poor design and arbitrary and we need to stop accepting it as a 'valid' solution to content.