Part of their longest aspect of training is discipline; through tolerance, ignorance or any other conflicting factors that would agitate the everyday soldier.
The more elite sections of the military cannot stand the idea of being detached/attached with lazier groups of soldiers for lacking appropriate amounts of discipline.
The Old Force Operators are trained to integrate with whom they’ll be tactfully inserted into; therefor their superior levels of training and sophisticated technologies allow them too remain immune about the deficiencies of the everyday soldier. Through months of training they are taught the ways for the position in which they will migrate into. Many would consider it a more in-depth acting class, but the OFO must go through the phases of training that mirror the everyday soldier. To capture a vague feel of what the everyday soldier went through.
You only know the Old Force exist, when they want you too.