Essentially. Usually you have to manage your shield resource or something so your guard doesn't break.
Warrior tanking is pretty interesting. It's all about backflips, lunges, sidesteps, dancing slashes that deal damage and threat AS you move out of the way. A really excellent warrior tank deals a constant flow of damage while flying about the boss, avoiding almost all the damage. It takes a pretty skilled player because 1 mistep and you can end up getting combo punched into the ground.