Confusing rulings

Certain cards that destroy others sometimes don't negate, say a mirror force is activated and the turn player activates a mystical space typhoon(quick-play). MST would be a pointless activation because it dosent negate mirror force. Say a monster that is equipped with a union that when it would be destroyed the monster equipped would be destroyed instead. When the equipped monster attacks a mirror force is activated, the other attack position monsters of the turn players monsters are destroyed while the union monster in the spell/trap zone is destroyed. Since mirror force dosent negate the attack still goes through and the attacked monster is destroyed

True, let us keep in mind that if we wish to negate our opponent's card effects, the text has the word NEGATE in it!