At first glance this seems like a relic of an old system. Much like the clear split between officers and regular troops in the soviet/russian system. A system that is heavily controlled by few might seem like a safe option in comparison to the alternative, where where responsibility has to be distributed among many possible "points of failure".
Some of it I can understand. The government of Ukraine seems very much afraid of loosing the mental image that western help is highly effective and more should be provided. Hiding tactical failures and other decisions that could be interpreted as incompetence, could be seen as an attempt to preserve that image.