Mostly, they wear glasses when they want to appear smarter than they are.
But there is no doubt the type of glasses could be a comm as well.
A relic of medieval history explains why glasses make people look smart
https://www.businessinsider.com/why-glasses-make-people-look-smart-2015-10?op=1
The reason they all cried like babies at the "Jan 6" hearing is because people tend to trust people who are in emotional distress.
It is a ploy intended to evoke a sympathetic response.
THIS IS ALL PSYCOLOGICAL WARFARE