As for submitting resumes in Zhilian and 58 cities, it can be said that it has no impact at all. The positions recruited through professional intermediaries are often high positions. If you want to go to an insurance company to make a claim investigation, the only feasible way now is to introduce.
However, I want to give you some advice. Claims investigation is by no means as beautiful as you think, and the entry threshold is very high. If you do well enough in 4S stores, your income will far exceed that of surveyors.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.