underfire:
I hope I never inadvertently ride in your airplane, or fly mine near yours.
I've made a handful of go-arounds in my airline career, and virtually all of them were due to ATC miscalculations or ground-based problems. I've ridden as FO or relief pilot through a few others that were due to weather or unstable approach. I'd MUCH rather ride through a go-around than a vain attempt to salvage a bad approach.
You seem to forget that a huge part of our training is on the job, and daily we run into situations that are not quite like we've seen before. Maybe a significant number of go-arounds could be prevented with perfect foresight, but I believe the vast majority of them are warranted NORMAL operations -- NOT "emergencies". In fact, a timely go-around is more likely to PREVENT an emergency.