I might regret asking this.,,,

But whats the deaaaaaaaaaaaaal with healers and dps NEVER putting points into threat reduction talents?

I just got to tanking heroics and all druid healers ive grouped with ignore Subtlety and Shadow priests never put a single point into Shadow Affinity.

Just annoying, not like a tank has the choice to ignore putting points into threat generation talents.

Or this is just the case of nobody giving a **** since most people are 3k+ gs so threat is never an issue...

Why are 3k+ gs people doing heroics?