Heal to Full: Should SWTOR raids be this hard?

First off, I'm not asking for a nerf or saying things are too hard. I'm stating the fact that the swtor raid have become significantly more difficult and am concerned that most guilds/groups won't be able to clear the bosses.

More specifically, I'm worried about the nightmare tier of these fights and what impact that will have on the game.

So my question, I guess, is if SWTOR can survive being turned into an actual hardcore raiding game.