It is a curious thing, and it is one that transcends all cultural boundaries. Historically the acquisition and holding of power causes an accretion to occur that leads to heightened formality, and eventually to immobility, or at very least a good deal of discomfort. We see this in all aspects of the journey of power. The gathering of sway to oneself increases the number of people in the mix. This results in more space being required to maintain authority. Structures to house those in power become larger. As the number of people involved grows, the complexity of the process of dealing with all of them also grows. And as this long process moves along, structures take on ritual meaning. Underlings gather power too. Their positions, and their duties become calcified, ritualized in their own way.
Attire relating to the taking on of power goes on an identical trip.
As the process gains momentum, the level of formality grows. It becomes necessary to make visible statements to support the power gained. Then the slow and steady increase in the number, volume, decoration, and elaboration of the garments begins.
Even a look at the Roman elite gives us a glimpse of this process in operation. The highest level people bore elaborately draped stoles that were yards and yards long, even though the climate doesn't require it heavy clothing very often. And these lengths of cloth had to be draped by servants who were trained in the art of arranging them.
Is this concept of increasing levels of complexity and ritual that leads to immobility entirely dead? No. It is merely transformed.
We traded a physical discomfort for a psychological one. We bargained away physical immobility for a less visible, but no less profound kind of constraint.