Confidence can often be mistaken for talent; driving the assumption that those who are loud must be more knowledgable than the rest.
Confidence and talent can come hand-in-hand, and they can also be seen separately. The former can be deceptive and trick us into thinking the latter; a convincing performance can overpower the content behind the message. It is easy to be impressed by eloquence; it is a skill in itself.
We should take it upon ourselves to have some level of conscious awareness that people operate individually and have diverse personality types. This recognition could allow us to identify real talent when it presents itself - whether it is yelled or whispered it is all valuable.