You did when you claimed a tasering was justified because "How was the cop supposed to know she wasn't drunk, on drugs, suicidal, or just plain whack-o?" a situation that applies to anyone on the street. If the tasering was justified because of that, it is justified at any time to anyone -- an absurd situation as you realize. You just need to realize that it follows therefore that someone's potential to be "drunk, on drugs, suicidal, or just plain whack-o" is not justification for tasering.
Her tasering was far from random.