It’s indeed fascinating how people are increasingly interested in the art of voice and becoming voice coaches. While the growing use of AI voices might be a factor influencing this interest, there are several historical and contemporary reasons for the focus on voice.

1. Historical Significance: As you mentioned, in ancient Greece, oratory skills were highly valued, and eloquent speakers played a crucial role in politics. The power of persuasive speech has been recognized for centuries.
2. Contemporary Relevance: Effective communication is still a critical skill today, not just in politics but in various professions and personal interactions. People recognize the importance of having a clear, persuasive, and engaging voice.
3. Voice Development: It’s true that many individuals with remarkable voices didn’t start that way. Voice coaching and training can help individuals unlock their full vocal potential. Alan Rickman’s example highlights how someone with initial limitations can become an iconic voice in the entertainment industry with proper training.
4. Personal Branding: Some individuals choose to retain unique elements of their voice, such as accents or quirks, as it can become part of their personal brand. This authenticity can make their communication more relatable and memorable.
   5. AI Voices: While AI voices have their uses, they lack the human touch, emotions, and authenticity that come with real human voices. This limitation is particularly evident when it comes to dubbing films or creating content that requires conveying emotions and personality.

Voice coaching, in this context, serves as a valuable skill that helps individuals develop their vocal abilities and communicate effectively. It can also help people discover their unique voice and use it to their advantage.