Why is it that so many of my co-healers simply ignore the dead in the party? Lately, I'm finding a good 70 ~ 80% of my co-healers simply do not rez anyone -- or only the co-healer or tanks. Has anyone else noticed this pattern?

I've been noticing this a lot more lately. I healed half a dozen Lakshmi Ex, as well as multiple runs of Omega on the various bosses (bad RNG), with different healers each time. And none of them rezzed anyone. I'm seeing things like Lakshmi Ex enrage because I can't rez people fast enough. I'm a healer main. I understand the issues surrounding rezzing and mana and hard casting. Even when I know a co-healer has SC, and I know it must be off CD (because I saw the healer use it more than a minute ago), they still don't rez.

Now, I know that one dead DPS isn't going to push the bosses to enrage. There's other issues at hand, but it isn't being helped by a healer who refuses to rez people. I just see them, sitting on nearly full MP (while I'm nearly OOM) and they're just happily DPSing away. No damage is coming in. They have time to hard cast rez, if their SC is on CD or they didn't take it. But they don't.

Why? Am I just encountering a ton of DPS mains in their off classes?