Not true. Monk does crap for DPS when they don't keep GL3. It happens automatically but the upkeep is not automatic. It allows you 6 seconds of disconnect at most to keep it up. As for why I wouldn't, Fist abilities have a recast timer of 3 seconds shared between 3 fists that you can weave in between skills but it requires at least 1 GCD skill in-between to switch between stances optimally. It does show that the monk in question does make an effort to go the extra mile in the damage taken reduction. The question is whether that extra mile is worth it. I think not most of the time. I know I used to play safe and stack with other people and let they cure 3 and heal all of us but they love me even more when I play recklessly (the good kind) to keep that GL3 up since I do more dps = boss die faster = they have to heal less. Different opinions I guess. I'd rather kill the boss a little bit faster than stay alive longer.