The biggest advantage of insurance companies is training. The agent training exam is only the threshold of insurance sales, and the closed training is the pre-job training for newcomers, followed by the training for quasi-supervisors, junior supervisors, middle and senior supervisors and so on. The training you mentioned must be closed training, and the time is about 3 days.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.