No More Big Pulls in Dungeons

[Rilifane]

That's the exact opposite of a healer that knows what they're doing. Healing takes priority, and you should never, ever, let your tanks health dip low willingly, especially in newer content where tank busters are exceedingly common.

A healer who lets people drop without them dying is actually someone who knows precisely what he is doing.
It's fine to play it a bit safe if it's your first run but after that you should have an idea about which cast is the tankbuster, which is the party-wide damage and which mechanic is completely avoidable.

Instant casts should be saved for emergencies when they're actually needed, not wasted over misunderstood priority or outright laziness.

Absolutely not.
A healer that is saving strong instant/ oGCD heals for emergencies definitely doesn't know what he's doing. They are there to prevent emergencies from happening in the first place while freeing up time to dps which -again- avoids emergency situations in the first place - dead mobs can't kill you.
Relying on hard-casted heals is the most inefficient way to heal past a certain level and a last resort when other options are exhausted. This isn't about messed-up priorities or laziness, it's simply the most efficient way to heal. Period.
Letting instants and oGCDs sit is a bad habit. It's fine for someone new and inexperienced, escpecially if they came over from a game where you needed to save them and healers were much weaker compared to incoming damage. But part of learning the healer role is using your full kit to it's full potential and that includes utilizing instants and oGCDs as often as possible to maximize dps time without frontloading them.