Sure, manual reversion would be a very serious situation, but so would loosing all engine power and there's not much training for that either. When you assess risk, apart from the severity of the situation, you at least have to take into account the probability of it occuring.
In that perspective the argument can be made that more sim training should be used for the mundane situations, such as ordinary go-arounds. I actually think this latter focus would prevent more accidents.