If perfection is exactly the same spine and weight for a dozen arrows, not a pound or grain off, then I contend that the perfect woodies haven't been built yet, and probably never will. But I agree with Bjorn, wood doesn't have to be perfect to shoot well.
But for the sake of argument, I've been collecting/saving and making arrows out of premium ACMEs and Sweetland forgewoods for about 40 years now. Can usually get a dozen shafts to spine the same before I seal them. Need a lot of shafts to start with, of course. Can even get almost all of them the same weight, i.e., the exact same grains, before I seal them.
Then it gets difficult. Feathers can vary by up to a grain per feather, points a lot more than that. Very easy to get a 10 grain or more variation in arrows due to feather and point weight differences, not to mention the finish. Some shafts will be just a tad more porous than others and soak up a grain or two more of finish. Even the amount of glue used on the points and nocks can vary the weight a grain or two. Finally, even after the shafts have been turned into arrows, they will still gain and lose weight due to humidity changes, and they won't all do it equally. That's why, in short, I don't believe a perfectly matched set of woodies can be made. Very close, yes, but perfect, no.
I might add that most measuring equipment isn't precise enough to determine if the arrows spine and weigh exactly the same. The pointer on a spine tester, for example, can straddle two numbers, lean on the heavy side of one hash mark, he light side of the same one. Most would accept the middle reading, but the arrow is probably a half-pound more or less depending on which side of the hash mark the pointer lands.
Just went back and read some of the early posts. M said he would accept 3# and 10 grain variance. That's very doable. Any good arrow maker should be able to do that, provided he has lots of shafts to choose from. And that's a very good/excellent set of arrows. Of course, there's nothing wrong with striving for perfection.