In company laboratories and training centers the new hires can understand how a certain technology or machines work based on practical experience. But you can hardly scale all these technologies and equipment because usually it is too expensive.
In VR we may construct the same reality with those technologies and machines and provide highly engaging learning but in a much bigger scale. We are not limited by the number of the machines, the capacity of the laboratories or training center or their location. Small VR device can fit a whole science lab.