So let me ask you which one gets telephoned worse.
"Keep your party alive. Everything else is bonus."
"Your GCDs are better put towards damage because your OGCDs are enough."
Further, all that guy said, essentially, is that good healers are good at managing their stuff. He wasn't the one firing off that the healers in question are 'bad' for playing one way or another. He might be insinuating they're on the wrong job (Ergo, "Green DPS" from "Healers with DPS"), but call them bad?
No. That came from the healer.
And it's not just with him. I've had discussions here, quite recently, where those involved flat out lie about their own capability because apparently if anyone admits to using a GCD heal, their opinion must be discredited because 'no one needs to use them'.
That attitude didn't come from a DPS or a Tank player. Most of us frankly don't care how you spend your downtime so long as we don't spend ours face down in the dirt from neglect.