1. Bad managers are a lot more common than good ones.
2. Good managers set direction and exist to acquire resources for the team and eliminate barriers out of the way of the team when they are headed in that direction. Their role is not to interrupt the team so that they can answer a question from upper management.
3. Most of half of urgent manager requests are due to lack of planning either on their part or on their manager's part. They knew they needed this information a few days ago, but felt "it's OK to interrupt the team when I really need it".
4. Most of the other half are due to their inability to push back.
5. There will be times when the managers do need information urgently. It is then their responsibility to accept the hit in productivity that it incurs.
I've worked with both good and bad managers. The good ones have these qualities.