One can only give one's audience the chance of drawing their own conclusions as they observe the limitations, the prejudices, the idiosyncrasies of the speaker.
The workplace is a collection of people in enforced and repeated proximity, their habits, noises and idiosyncrasies turning into something familiar for some colleagues and disproportionately grating for others.
Over time both big and small groups got better at making themselves understood, but the bigger ones did so by creating more systematic languages as they interacted, with fewer idiosyncrasies.