Yep, they're covering themselves from fraudulent warranty claims. Where are the failed bearings?
In the recycling bin in my shop.
That's hardly proof. Where are the piles of prematurely failed bearings?
See above.
In my experience (a mere 11 years in the shop), very few frames actually require re-facing the BB shell, and on those that do, it's pretty obvious that it's needed. Binding and difficulty in adjusting bearing preload are two signs that something is amiss.
I'm standing by what I first said. Unless there's a problem, facing/chasing is unnecessary.
Perhaps we're just different types of mechanics. I prefer prudence and earing on the side of caution. You?