I wouldn't be surprised if Diablo development is why the policy was in place. One of ANet's founders did a lot of work trying to help ship Diablo and it sounded

I wouldn't be surprised if Diablo development is why the policy was in place. One of ANet's founders did a lot of work trying to help ship Diablo and it sounded like it had some serious engineering and quality culture issues (iirc Diablo was originally being developed by another studio that Blizzard acquired, but I might be misremembering)