First off, not every capability is positive value to have. If you can irreversibly give someone a million dollars from your phone, people have a pretty big incentive to stick a gun in your face and make you do that. "It's physically impossible to do that" is an extremely useful negotiation stance; the winning strategy in a game of chicken is to make sure your opponent knows you threw the steering wheel out the car window.
Your emotional system is a really powerful decision-making engine that is almost completely immune to reason. It's extraordinarily hard to use logical reasoning to convince someone to not be sad that their dog died. This is a feature, not a bug. Anger is a much more relevant emotion for this - someone with a hair trigger on their temper has figured out that wielding that implicit threat serves their interest.