Have you ever tried running a company? Let's say you have a band (which is a form of a company. They sell entertainment). You can't find a drummer. Would you train one? How many years are you going to able to wait before you start your band for real while your new drummer trains? In the mean time you aren't able to make any money because the band can't perform.
The average size of a company is 1-4 people. They aren't Walmart size etc.. They don't have the budget to train an employee
https://www.naics.com/business-lists/counts-by-company-size/