That may all depend on your application.

Are you shooting outdoor field spots out to 80yds in high level competition, or any other sort of scenario like that(3D, FITA)?

Or do you just care about putting all shots in a 6" circle out to 30yds for bowhunting?

For some, that .001" tolerance may mean a lot. For bowhunting out to 30yds or so, I don't think it matters much. If you want to spend the extra cash on that sort of thing- then you'll have the peace of mind knowing that your arrows are tight toleranced when they are heading to your deer 22yds away.

I do spend time and money on my target arrows where I need all the help I can for accuracy and CONSISTENCY from arrow-to-arrow.

Best of luck-