Isn't it directly related to it's being an investment than to hire staff? You can't expect inexperienced people to do work that an experienced person has to do.

Isn't it directly related to it's being an investment than to hire staff? You can't expect inexperienced people to do work that an experienced person has to do. So to train means you need to have the main work carried out by an experienced person, you have extra training capacity, and over on this you have funds to hire new graduate to train. You also would not expect a return on this investment quick.