What's with all these people single-targetting during big pulls in dungeons?

[Altena]

Why do people want to pull more then one pack at a time? It is a pug picked at random by a computer. What you like and what they like are not the same. Also anyone who has been around since 2.0 it is pretty obvious SE has sided with the smaller pull group. Can you pull more then 3 trash sets before you hit some sort of gate. We used to be able to go with friends and pull to a boss. But people got cranky and mean and fought over how randoms played and now we have gates everywhere.

We can't have nice things because people don't understand the difference between random duty finder player and picked party finder player. If its a party finder player go to whatever zone people hangout in and shame them. If it was some random be happy they dpsed like they know how to tap 6 buttons.

Sorry to say but you're in the minority if you prefer to run a dungeon slowly.

The community chooses the norm, not the devs.
That being said, you can still pull 3-4 groups at a time in most cases before hitting a gate and that's what the majority of the community do.
Furthermore, dungeons have less mobs between bosses, and mobs can't be avoided anymore. (You used to be able to slip passed some groups without aggro if you were smart, which you can't do anymore)

By all means, if you're a DPS and don't wish to do more than 3 mobs at a time, you're more than welcome to make a PF.. However the community norm is to pull groups, so 9 times out of 10, that's what you get when you zone into a DF dungeon.

As a DPS your job is to do the most amount of damage you can, regardless how many mobs is hitting the tank. If you choose to significantly under-perform because you don't want to use your AoE skills out of pure stubbornness, you're no better than a healer who doesn't want to cast cure, or a tank who doesn't want to hold hate.

You evidently don't understand that the community decides the norm. If you deviate from that norm (in which case, deciding to run a dungeon 3-mobs at a time), then you likely will suffer from vote kicks and people venting their frustration in duty finder..
I don't kick these people, nor do I harass them.. But I definitely ask them if they can please use their AoE skills, or use goad (usually with no response).