Memory of Sigma's speech from X8: Zero... Who could have imagined that we'd cross paths at the end of the world. The moment your virus entered my system, the seed had been planted. That's when it all began... The destruction of the world!"
Zero: I already feel violated. I don't want to get raped by an Artificial Intelligence
Sometimes when you're driving down a road, a bug hits your windshield. It's ugly and unpleasant, but you just activate the wipers / cleaning fluid and it's gone in a few seconds. It's just part of driving down the road. You don't dwell on it, because that'd be silly. Bugs aren't worth the time.