sorry just read Niqote's post.. sums it up nicely

Originally Posted by
Niqote
https://www.youtube.com/watch?v=KUVI5ukXcRI <- This
I am a career WHM so I am completely biased ... but
I do not want to see another class healing just as well as the WHM.
In FFXI Dancer was great, SMN was great, they healed but
kept their own Identity.
Those SCHs however just rode on the coat tails of the BLM and WHM... I do not want to see that happen again
Let me add one thing though
I think the problem this thread is creating is you have people who play "MMORPG's" and you have people who play FFXI, and you have people who play Final Fantasy.
Final Fantasy has been the definitive RPG for many years. I am sorry its not a matter of opinion here, but FFVII brought the RPG genre to a much broader crowd and other companies saw it made good money and wanted to invest in that style of gaming.
***The main issue is the standard MMO has "healers" and Final Fantasy has made a staple with healing with a White Mage role job. If it wasnt specifically a WHM it was a person/role that was perceived as the White Mage. There is no need to change that formula it has worked and will continue to work. ***
The reason you have multiple role oriented classes is because they are more popular.
Ex.
Close Range Attack: Dragoon, Monk, Ninja, Samurai
Long Range Attack: Ranger, Black Mage, Summoner
High Health: Paladin, Knight, Warrior
Supportive: Mime, Bard, Dancer
Not as many people are interested in playing a HP restorative role as much as "beat them up" or some other role. Thus no need for adding another specific HP restorative role. Especially when you have jobs that support the WHM such as Paladin, Summoner, Bard, Dancer, etc.