A safe career can be compared to many things! I don't know what you want to hear, but I will give you some examples. The cause of safety can be compared with unremitting efforts for the interests of the people! It is a noble practice to give up one's family for everyone! The cause of security can be compared to a safe haven for people to escort. The cause of safety can be compared to the selfless cause of serving the people and sacrificing one's youth for everyone's safety. This is the noble part. And the real part. The janitor is a temporary worker, a watchdog, and a useless garbage job with a living allowance every month. This is the real version.

In short, my personal views are different, and there are different metaphor methods, which I hope will help you.