Please tell me you are actually trolling?
There are only a few reasons why wall to wall pulling shouldn't be done, namely woefully under-geared, but other than that there is no excuse. Like even saying you are new to a dungeon after HW levelling dungeons is a poor excuse. All dungeons have more or less the same formula outside of the odd dungeon that has gated sections of small packs before the next set spawns. All roles played at a basic level, not even optimised where you are maximising your buffs, just using you standard AoEs and the odd damage buff here and there are capable of wall to wall pulls at a decent pace. Obviously this requires tanks to be making use of their defensive cooldowns and healers making use of their kits but even then one can often compensate the other.
now if you are a tank or healer and you are not actually making some modicum of an effort then stick to trusts or learn to play your job, because you are actively griefing by not respecting other peoples time by putting in an effort to work together to complete the dungeons in a timely fashion. 99.99% of the player base do not want to run the entire 90 minute clock of a dungeon to get their levelling / tomes/ gear for glamour or ultimate. People have better things to be doing with their time.
And a common thing means if dungeons are designed to allow the practice that so commonly happens in a most dungeon runs by the majority, and jobs are over equipped to handle wall to wall pulls you have 0 excuses for not doing it. And sure I might come across as sounding a little toxic, but most of the people that cry "you pull, you tank" or have their main character syndrome shattered and rant on the forums, maybe instead of crying, they should realise they need to learn how to play the game as the majority of the playerbase runs dungeons. If still in denial then find some friends or FC members to run at the snails pace they want or again use trusts.