What is the key recommendation for launching a career as a professional speaker or motivational speaker, according to established wisdom?

Success is significantly easier when public speaking is added as a second career built atop established expertise or business success.

The text explicitly advises aspiring professional speakers to avoid making speaking the very first career endeavor. Success in this field is described as being significantly easier when the public speaking aspect is developed as a secondary stream of income or influence, layered upon an already established foundation, such as business ownership or other professional expertise. This approach allows the speaker to teach others how they achieved their initial success, using that proven track record as the core subject matter, much like an established business owner creating a lucrative speaking stream by teaching their methods.