>A finger slip, a bug in a Windows update, or even a cosmic ray flipping the "do not upload" bit in memory, could all lead to the key being accidentally uploaded.

This is absurd, because it's basically a generic argument about any sort of feature that vaguely reduces privacy. Sorry guys, we can't have automated backups in windows (even opt in!), because if the feature exists, a random bitflip can cause everything to be uploaded to microsoft against the user's will.