Looking for a clear explanation...

[Imp]

What I love about this, and SP in general, is that it gives me just enough science to decide whether or not to pull the trigger. Once I do there are a myriad of factors, not the least of which is random luck, that decides the outcome. It can be frustrating, but so is real life

For me its what makes this game you know what should happen but things dont always go as they should in combat situations.
Nearly always seem to happen when its important causing a sudden change in plans or that "Oh heck" how do we get out of that moment.
You remember these whether its the fluke 3% shot that created an opening or the unit that just refused to give up & die.