Got to agree on some points, people have the right to be new and not feeling comfortable with their toolkit. Because when they reach 60, it'll be the first time for them where people won't always be overgeared and easy to heal. If you see it's your healer's first time, act like you're having a first timing healer. Doesn't matter if you're full STR or VIT (even if VIT can make things more comfortable), the point is, allow them to learn, give them advice and the instance will take like 5 minutes more, instead of half an hour if you rush like hell.
Or get out of the instance and try again in the DF (you're a tank, you tag quickly), or find a healer you trust.