I have the same experience. I work the same way; if you call something in my area I'm going to assume you saw something that needed grabbing.
Again, this question was posed by a rookie wanting to know why it matters. Do i tell rookie partners to stay out of my area? No. That would make me an elitist pr1ck.
I would, however, save the concept of the 3 Bs for 3-5 year officials.