The Final Reason on why we have more DPS than Tanks or Healers

[ErryK]

they have equal responsibility dps are killing the thing and most mechanics in most fight just by design(there are 4 of us) affect the dps and failure to do them leads to people dying and wipes

Incorrect.

Ignoring gearing (including accuracy issues) and mechanics, it all boils down to this:
DPS

• Deal Damage

Healers

• Deal Damage
• Heal

Tanks

• Deal Damage
• Tank

And even then, a lot of groups care more about how well you deal damage over how well you can tank or heal.

[thegreatonemal]

Incorrect.

Ignoring gearing (including accuracy issues) and mechanics, it all boils down to this:
DPS

• Deal Damage

Healers

• Deal Damage
• Heal

Tanks

• Deal Damage
• Tank

And even then, a lot of groups care more about how well you deal damage over how well you can tank or heal.

a single dps in an 8 man party does more dps than all of them combined there are 4 of us killing the things falls on us. yes tanks deal damage they have to its how aggro works and healers do it because they'd just be standing there over wise but total they make up about 5% of a bosses hp in terms of damage.

[ErryK]

snip

A single DPS in an 8-man does about 2,000+~ if they're decent, there are situations where it might be less, but this is the guideline. Tanks, realistically only Warrior though, can do up to 2,000 as well. Healers can go up to 2,000 as well from what I've seen.

Tanks deal damage, yes. But they're expected to deal damage in their damage stance, not within their tank stance, they're also expected to have their high-damaging skills (ie. Carve & Spit, Fell Cleave) buffed to the max in any way possible when used. This is why NIN is part of the meta, because not only can it take advantage of slashing debuff, but also boost the aggro of a DPS stance tank's opener. Healers are expected to deal damage whenever possible, regardless of the fact of sitting there and not doing anything, and on top of this, if you choose to use a GCD on a damage skill over a healing skill and it cost the life of let's say 3 people... that's a huge responsibility... because you potentially might have caused a wipe in 4-man content, I say potentially because I've seen people bounce back with just the healer alive.