Well, that is a noble idea, i suppose, but doesn't bear much relation to reality. Often, when people haven't had a fight, they assume that when it comes to an actual fight that nature will take its course and they will explode with natural agression.... but it often doesn't happen like that, and it is dangerous that people don't know. Fear can totally supress one's agression - it's a natural ape response to being chastised, due to evoloutionary reasons of ape trouping behaviour.
Agression that makes one totally lose control is one thing - but a certain ampunt of agression is very good - it overcomes fear, and makes a person hard to handle.
Agression is good! A fighter needs it, and in, say, Western boxing, everyone can tell the boxer who hasn't got it.
Point being that 1, agression is a necessary means of overcoming fear, and two, the virtue of controlled, channelled agression is corrupted by people in to meaning that CMA is nothing to do with fighting because fighting is too agressive.