What is the difference between a patent agent and Patent examiners?

a patent agent means that a patent is very professional. If ordinary people can't do it, let a patent agent do it for you.

Patent examiners just depends on whether your patent works. If it works, you will be authorized. If it doesn't, you will have to modify it or reject it.

just like you can't drive and ask for a driver, then the traffic police will judge whether there is a problem with driving.