It takes a lot more to get a P&C agent up and running than a life/health agent. They don't want a new P&C agent learning the ropes on their loss ratios.
It actually works both ways. Experienced P&C agents don't like bringing on new carriers. Its sometimes more work than benefit.
Dan is right on - that is the main and most important reason. I would also add that they don't want their staff tied up answering newby questions and nursing along a new agent to the independent agency system.
One other thought. It takes $$ for an insurance company to start a relationship with a new agent. New agencies are no different than a lot of start up businesses in that the failure rate is higher so why sink that capital into a venture that has less chance of succeeding than an established agency.
My points are valid but secondary in importance to the key factor Dan brought up.
At first, I didn't understand either, but as I watched new agents, I saw why. Great examples are listed above. Over the years, we have added many great direct appointments because we had built a solid book of business.
Ouch! So how does one get started? I have my P&C and am partnering with a person that has a tremendous deal flow for his own business, which is a natural partner for homeowners insurance. I have the potential to submit several policies weekly provided I have someone to submit them to. Once I build my book , I would have the leverage needed, but what do I do until then? work with wholesalers, GA's?