Business development is a profession for which few lawyers are qualified, but all can become so. You have to learn, make mistakes, gain experience.
Online, you can learn 90% of what you need, inexpensively. The other 10% requires human coaching -- to apply what you learned.
Good news: When it comes to rainmaking, lawyers are part-time rainmaking apprentices competing against other part-time rainmaking apprentices.
The curriculum mentality from law school will imprison you in business development mediocrity. A practice mentality will enable mastery. Understand the difference.
Law firms can no longer limit availability of business development training to their most senior, or influential, partners. Such skills are now as mission-critical as legal skills, and must be cultivated throughout the firm.