Why is the healer class basically a one spell dps class?

[AikenDrum]

I mean, what is the fantasy here? Would people blink if you just made healing playing BLM until it is heal-o-clock in the trial schedule and you hit "heal everyone" button few times and then go back to firing the copycat RDM/BLM/SMN rotation?

isn't it kinda already like that? was forced to heal few DRs on seraph whm and most of the time two lilies buttons were all the healing needed

anyway, the question was whether or not having to heal with healing spells would interfere with dps jobs rotation - and it didn't feel like that for rdm; and i also vastly preferred playing a healing role with rdm than with whm