If you choose to ignore a mechanic, there’s a good chance you will die. Dead DPS do no DPS.
It’s a good way to get cleaved or tankbustered and die. Dead DPS do no DPS.
Healers have heals that are mostly centered around themselves (there are exceptions), but this helps them to be able to do top ups quickly from raidwides.
If you decide to stay as far from everyone as possible, do not be surprised if a healer lets you die. Dead DPS do not DPS.
This cannot be stressed enough. Know what types of interrupts you have!
Surecast (Casters) and Arm’s Length (Physical DPS) can be used during some mechanics to allow you to stay in place and finish a cast, or combo!