Folks, in the nicest way possible - stay on topic!
I'm always amazed that if you watch Jools Holland and spot all the basses being played you will see that the mode (average) bass is indeed the P-bass in its various forms. I did this the last three times I watched Jools and the P wins hands down. These are quite often bassists you've never heard of but are working pros. In my head I just accept it. No need to get angry or cross with Scott Devine. Though to the OP I would say that robustness, simplicity, tone, availability, modest weight and neck feel would be my reasons.
PS, the transit joke was brilliant.
Peace
Davo