Where can anyone go and pick through arrows until they have a perfect dozen?
No place that I know of.
But that doesn' t stop me from returning defective merchandise. If a shaft is not within it' s advertised tolerances, then it is a manufacturing flaw and it is defective. I have a right as a consumer to expect it to be replaced.
When you buy a dozen eggs, do you expect that you' ll only eat 5 or 6 and the rest will be rotten?