Many people can't play long. It saves them time and the majority appreciate it with their body language or commendations.
Two or three minutes arent that long...yeah this is the WOW mentality.

This aint WOW.

As for 'commendations"..you may obsess over those, i dont. If you are....then stop. Commendations arent a "medal" to boast about.

If you don't pull big, sometimes people complain but they never do when they are big.
Ive seen parties wipe when they pull big..so no, wrong.

Small pulls double the amount of time the dungeon takes. If you are confident enough to pull big then there isn't much reason to take twice as long.
Rubbish.

It challenges yourself to use mitigation better, the healer to heal more and the DPS to think of how to kill a crowd of enemies as fast as they kill a single one. By doing them it educates people how to do them.
There is no hurry and no rush and no fire...two minutes more wont hurt anyone.