takes a while to get dialed in on a method, and even then things still go wrong. i almost always have a fuck up plant or two in my mix, if i get real unlucky it might happen to an entire crop to some degree or the other.
last summer i had a situation where the lights were off for 9 days. in a new room i built recently, apparently mites were around and i got about half yield because i had to keep yanking off leaves throughout late flower.
if you don't run into these situations, you are not a grower of any sort. you adjust and move on.
even skunkdouche and chuck know this. or maybe they don't. i haven't seen anything from them that indicates that they are better growers than you are.