As a GM do you ever feel sorry for your players? You might decide to provide intervention if they are in a difficult situation or healing if they are about to die.
Never feel sorry for my players. I usually think its funny what they do. Of course when they are stuck, I'll drop a hint in form of a book or a dead body with note a them.
As for Dying, it's unfortunately part of the game. One thing I don't do is place them in impossible situation. If the odd of winning a fight are too high, they will have a passage to run away from that fight. If they don't, then its not on me
I don't know if any of the Dungeon Masters of the games I am in feel sorry for me but I know I can get my characters to do some pretty insane stuff at times. Usually he needs rescuing from his errors.