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

[Cidel]

consequently, the healer playerbase has plummeted, the skill of healers on average has plummeted, and very few people pick up the jobs to replace them and witht he lack of difficulty or challenge

I have to wonder, are we playing the same game or do I just have (bad) luck? I see this assertion get thrown around here and there, and it seems like hyperbole. Oftentimes in current content, healers are everywhere. It is not uncommon to get invited into parties with 3+ healers out in Bozja, get matched with parties with 4+ healers in DR, and in the active weeks following a new EX trial's release, it can be an actual race to join a PF with a free healer spot... The only place I actively see people avoid healer like the plague is in PvP.