Speaking can even help your politically the way it did for Queen Elizabeth.
Elizabeth didn't just sit down with her la top and start making PowerPoint slides. She was tutored by classical scholars, most notable Roger Ascham, who held the office of public orator in Cambridge. In the Renaissance it was important to be an eloquent speaker, as it revealed to the public that you had a high degree of education. Maia Perry, a prominent modern historian of the period, said that "speech making came naturally to Elizabeth who quickly developed this skill of talking with such style and flamboyance that contemporary analysts treasured even her most casual sayings.” Yes, Elizabeth was the first Queen of the Soundbite.
And Elizabeth certainly used every speaking opportunity to gain political power. For example, on a royal tour stop at Cambridge she addressed the university, speaking extemporaneously in Latin. Today, being an eloquent speaker can also makes you look smart, give you an opportunity to be seen and gain political power, but also give you an unique opportunity to connect face to face in a normally very high tech environment.