Why many Insurance Agents leave at early Stage

Why many insurance agents quit at early stage. The pains as some cried. 

If you know of many insurance agents that left the job they were employed to do after few months of working with the company, you may be asking yourself why it happened like that. You may ask yourself "why many insurance agents leave the job after working for a short time?" Why do they quit the job? What is really wrong with that kind of job? Does it mean that insurance agency job does not pay well?