My opinion is that teh anxiety is due to the sanitation retentitiveness as well as the time investment. If you could tell if it is good/bad the same day as your boil you wouldnt stress it so much. The fact that you need to wait days/week(s) to even get an uncarbed sample makes you stress over it. The same reason that when smoking foods you really want to open the lid and look at it/poke it/check the temps even though it has only been on for 15 minutes out of a several hour smoke. Not to mention you wouldn't be brewing if you didn't at least enjoy what you are brewing and really want it to taste good.