Well it depends... there is no weight and balance licence required in Europe, I don’t know about the rest of the world. It is possible that an agent starts on a Monday with no aviation experience and is producing a load sheet on Friday still with no aviation experience.
The theory is that the CLC Agents have experience and training that guarantees a safe loading. It also means that you only need to audit one facility and not every station.
I can certainly attest to a ramp agent being allocated to a DC8 freighter load sheet having never worked a cargo aircraft before and only having used Kilos. The crew looked at the figures and decided to operate MAN-MIA direct instead of via Gander because the payload was low ….. several hours later they landed in Gander “on fumes” this incident was due to a management instigated overtime ban in place at the time to save costs. The management said that this dispatch had been trained for load control so could do any aircraft.
On the flip side CLC officers will eventually have no “real world” experience which will leave them with no concept on volumes or how to load best for down line protection etc
As they say … you pays your money you makes your choice