I guess I should really restate myself, since we probably got off to a bad start.
The question that I really want to ask is the benefit of having that extra bump, and not for us to explain why it physically works for each person subjectively.
I appreciate all the responses about its ergonomics and such, and I apologize for miscommunicating my question. It's just that I really don't understand the physical playing benefits that the bump offers over another body shape, such as the P-shape.
It also seems that there's a divide right now, where some people say it helps with neck dive, whereas others say it doesn't do anything beyond providing a different shape to the bass to make it unique from the Precision.