I get angry because of frustration about things beyond my control that impact me negatively and can't simply be ignored. Knowing that extra step is great and all, but doesn't reduce the frustration or the anger. I'm sure that identifying the difference is helpful to some people who can ignore or address the actual cause of their anger.
Note: I don't get angry about frustrating things that I can do something about, or can be ignored.
Micropayments would scale at a ridiculous rate like microtransactions in games have, so your $20 example would be at least $200 in reality by now.