No, of course not. I'm a big fan of Susan Cain's book "Quiet: The Power of Introverts in a World That Can't Stop Talking".
Introverts are not necessarily shy or anti-social – these are qualities found in extroverts and introverts alike.
Introverts just need more energy when they are with other people. Extroverts even gain energy when they are with others.
Given that the noisy, interruption-based marketing style does not work anymore today, introverts are perfectly skilled for marketing: The new forms of marketing that focus on helping people get their problems solved, they give introverts a big advantage.