Some of noted Gandhi-style pacifist protest works better with some groups than others. If you are protesting against a group that thinks its wrong to kill unarmed protesters you’re more likely to survive than if, as in Myanmar, you go up against people who just kill any opposition that gets in the way.
Some might consider this an effective argument against pacifism. If pacifism is put forth because it works better than violence or force, then yes, such an argument would have force. But at least some of the pacifists I know consider pacifism to be right regardless of whether it works or not.